Search references for UNIVERSAL DISK-FORMAT. Phrases containing UNIVERSAL DISK-FORMAT
See searches and references containing UNIVERSAL DISK-FORMAT!UNIVERSAL DISK-FORMAT
Vendor-neutral file system, used in practice for DVDs and other optical discs
Universal Disk Format (UDF) is an open, vendor-neutral file system for computer data storage for a broad range of media. In practice, it has been most
Universal_Disk_Format
File format developed by Apple and used by macOS
An Apple Disk Image can be structured according to one of several proprietary disk image formats, including the Universal Disk Image Format (UDIF) from
Apple_Disk_Image
Content publishing on optical disks
simply as "ISO") and Universal Disk Format (UDF). ISO is most common for CDs and UDF is most common for DVDs and BDs. ISO 9660 is a format mainly used on CDs
Optical_disc_authoring
carrier. It is read and written using a floppy disk drive (FDD). Floppy disks were an almost universal data format from the 1970s into the 1990s, used for primary
History_of_the_floppy_disk
Optical disc medium for PlayStation Portable
movies early in the format's life caused major studios like Universal and Paramount to rescind their support. Retail support of the format experienced similar
Universal_Media_Disc
Flat, usually circular disc that encodes binary data
systems specifically created for optical discs are ISO9660 and the Universal Disk Format (UDF). ISO9660 can be extended using the Joliet extension to store
Optical_disc
Digital optical disc data storage format
implementation of the ISO-13346 file system (known as Universal Disk Format) for use on the new DVDs. The format's details were finalized on December 8, 1995. In
DVD
Digital optical disc format
Blu-ray Discs. Blu-ray Disc specifies the use of Universal Disk Format (UDF) 2.50 as a convergent-friendly format for both PC and consumer electronics environments
Blu-ray
Write-once optical disc technology
40 TB each Hard disk drives are currently available up to 30 TB (HDD) capacity in 3.5-inch format and 5 TB in 2.5-inch laptop format. However, unlike
M-DISC
Topics referred to by the same term
political advocacy group Virtual Allocation Table, a component of the Universal Disk Format Vats (disambiguation) All pages with titles beginning with Vat All
Vat
products. It was responsible for the creation and maintenance of the Universal Disk Format (UDF) file system specification (derived from ISO/IEC 13346 and
Optical Storage Technology Association
Optical_Storage_Technology_Association
Optical disc designed by Sony and Panasonic meant for data archiving
Optical Disc Archive". TVTechnology. Retrieved 2022-09-23. "Sony's new optical disk can store data for 100 years". HT Tech. 2020-06-15. Retrieved 2022-09-23
Archival_Disc
Blu-ray Disc media that can be written to using an optical disc recorder
Recordable Format Part 1 - Physical Specifications - February, 2006, section 5.1. Defect Management and Logical Overwrite OSTA Universal Disk Format Specification
Blu-ray_Disc_recordable
Apple multi-architecture binary files
The universal binary format is a format for executable files that run natively either on both PowerPC-based and x86-based Macs or on both Intel 64-based
Universal_binary
File format used by Amiga computers
Amiga Disk File (ADF) is a file format used by Amiga computers and emulators to store images of floppy disks, a single hard disk volumes (partitions) or
Amiga_Disk_File
Digital optical disc data storage format
the CD-ROM format, which initially offered more capacity than contemporary personal computer hard disk drives. Additional derived formats include write-once
Compact_disc
Computer filing system
Some disk file systems are journaling file systems or versioning file systems. ISO 9660 and Universal Disk Format (UDF) are two common formats that target
File_system
Optical disc storage medium
Ultra HD, UHD-BD, or 4K Blu-ray) is a digital optical disc data storage format that is an enhanced variant of Blu-ray. Ultra HD Blu-ray supports 4K UHD
Ultra_HD_Blu-ray
List of technologies used to write to optical discs
electronics of the optical disc drive. There are numerous formats of recordable optical direct to disk on the market, all of which are based on using a laser
Optical disc recording technologies
Optical_disc_recording_technologies
Topics referred to by the same term
writing), a technology for reading and writing CD-RWs, similar to the Universal Disk Format Mount Rainier National Park Mount Rainier Forest Reserve Rainier
Mount Rainier (disambiguation)
Mount_Rainier_(disambiguation)
Proprietary optical disc format used in the Dreamcast and other Sega systems
optical disc format developed as a collaboration between Sega and Yamaha for the Dreamcast and other Sega systems. A double-density format based on the
GD-ROM
format DAA – PowerISO .daa format D64 – Commodore 64 floppy disk archive DAA – Closed-format, Windows-only compressed disk image DMG – Macintosh disk
List_of_file_formats
Obsolete optical disc format
As with previous optical disc formats, HD DVD supports several file systems, such as ISO 9660 and Universal Disk Format (UDF). All HD DVD titles use UDF
HD_DVD
Optical analog video disc format
write-once, read-many format intended for professional use. Housed in a protective caddy, the disc resembled an oversized floppy disk. The CRVdisc was used
LaserDisc
Recordable optical disk technology
a packet writing-enabled Universal Disk Format (UDF) is mounted, the operating system may perform a "background formatting" while the disc is not in
DVD_recordable
Removable disk storage medium
three most popular formats of floppy disks (and their drives) are the 8-inch, 5¼-inch, and 3½-inch versions. The first floppy disks, invented and made
Floppy_disk
Hard disk storage system
REV format was discontinued: 035 GB - August 31, 2009 070 GB - December 14, 2009 120 GB - January 25, 2010 Castlewood Orb Drive Universal Disk Format https://www
REV_(disk)
Computer drive that uses removable MO media
Although optical, they normally appear as hard disk drives to an operating system and can be formatted with any file system. Magneto-optical drives were
Magneto-optical_drive
Data storage device
expensive than the standard size, and do not work in all drives. Universal Disk Format (UDF) version 1.50 and above has facilities to support rewritable
USB_flash_drive
8 centimeter diameter compact discs
that these devices used a packet writing format which took away some available disk space for use by formatting information. A common problem for Mavica
Mini_CD
Compact disc format used primarily for karaoke discs
commercially released CD to utilize the CD+G format was Eat or Be Eaten by Firesign Theatre in 1985. A related format, CD+EG, offers enhanced graphical capabilities
CD+G
Removable cartridge disk storage system
Iomega software is that the long format can format the 100 MB disks with a slightly higher capacity. 250 MB disks format to the same size either way). The
Zip_drive
Format war from 2006 to 2008 between Blu-ray and HD DVD
service (link) Junko Yoshida (April 19, 2005). "Sides close to deal on HD disk format". eetasia.com. Archived from the original on November 26, 2007. Retrieved
High-definition optical disc format war
High-definition_optical_disc_format_war
8-centimeter DVD disc
2023-01-14. 80 mm DVD - Read-Only Disk (PDF) (Standard) (3rd ed.). ECMA. April 2001. p. 4. 268. 120 mm DVD - Read-Only Disk (PDF) (Standard) (3rd ed.). ECMA
MiniDVD
CD-based format meant for digital video distribution
CDDV) is a home video format and the first format for distributing films on standard 120 mm (4.7 in) optical discs. The format was widely adopted in nearly
Video_CD
Type of magneto-optical medium
helped create. MD Data competed in a format war with other disks such as SyQuest's EZ 135, Imation's SuperDisk, and the Iomega Zip. Despite some early
MD_Data
Data format used for audio compact discs
the standard format for audio compact discs. The standard is defined in the Red Book technical specifications, which is why the format is also dubbed
Compact_Disc_Digital_Audio
Book series that contains the specifications of Compact Discs
The Rainbow Books are a collection of CD format specifications, generally written and published by the companies involved in their development, including
Rainbow_Books
Optical disc file system standard
session data was saved before the writing software was closed down. Universal Disk Format (UDF) based on ISO/IEC 13346 (also known as ECMA-167) Write Once
ISO_13490
Video format standard for DVD-R, DVD-RW, and DVD-RAM media
optical media. DVD+VR VR Mode VOB DVD formats Universal Disk Format DVD-RW, DVD-R, DVD-RAM, and DVD-R9 "DVD Format/Logo Licensing Corporation". www.dvdfllc
DVD-VR
Write-protected data storage device
recorded a second time. Through packet writing, which uses the Universal Disk Format (UDF) file system, these discs often use a file system that permits
Write_once_read_many
Video CD-based optical disc format
Super Video CD (Super Video Compact Disc, abbreviated as SVCD) is a digital format for storing video on standard compact discs. SVCD was intended as a successor
Super_Video_CD
Types of disc used in the GameCube, Wii, and Wii U consoles
miniDVD; Wii Optical Discs are based on DVD format, and Wii U Optical Discs are based on Blu-ray format. To maintain backward compatibility between generations
Nintendo_optical_discs
Novel optical disc based on holography
similar to the head, track, and sector information on a conventional hard disk drive. On a CD or DVD this servo information is interspersed among the data
Holographic_Versatile_Disc
Topics referred to by the same term
telescope UDF 423, a distant spiral galaxy UDF 2457, a red dwarf star Universal Disk Format, an operating-system-independent file system commonly used on DVD
UDF
Format used to store digital video on DVDs
DVD-Video is a consumer video format used to store digital video on DVDs. DVD-Video was the dominant consumer home video format in most of the world in the
DVD-Video
Utility in Mac OS
Disk Copy 6.0 added support for the New Disk Image Format (NDIF). Versions of Disk Copy in Mac OS X added support for the newer Universal Disk Format
Disk_Copy
UDF packet writing software for Windows
File System in Windows Vista and Windows 7. InCD formats media, and writes to Universal Disk Format. Systems which do not support UDF (such as Windows
InCD
Circuitry that controls reading from and writing to a computer's floppy disk drive
on-disk format using one of a number of encoding schemes, like FM encoding (single density) or MFM encoding (double density), and reading those formats and
Floppy_disk_controller
Optical disk technology
CD-RW (Compact Disc-Rewritable) is a digital optical disc storage format introduced by Ricoh in 1997. A CD-RW compact disc (CD-RWs) can be written, read
CD-RW
CD-based format that allows for song information to be stored alongside audio data
added to new revisions of the Red Book. The actual text is stored in a format compatible with Interactive Text Transmission System (ITTS), defined in
CD-Text
List of optical disc recording modes
sequentially to the disc in one uninterrupted recording session. The on-disk contents result in a lead-in area, followed by the data, and closed by a
Optical_disc_recording_modes
Optical disc authoring software
video CDs, video DVDs K3b can also burn data CDs that support Universal Disk Format (UDF), Rock Ridge, and Joliet file systems. Free and open-source
K3b
File system for CD-R and CD-ROM optical discs
standard. This new format addresses most of the shortcomings of ISO 9660, and a subset of it evolved into the Universal Disk Format (UDF), which was adopted
ISO_9660
Pre-pressed compact disc containing computer data
UDF format, which was adopted for DVDs. A bootable CD specification, called El Torito, was issued in January 1995, to make a CD emulate a hard disk or
CD-ROM
Failed format intended to compete with Blu-ray and HD DVD
VMD was intended to compete with the blue-laser Blu-ray Disc and HD DVD formats and had an initial capacity of up to 30 GB per side. At a physical level
Versatile_Multilayer_Disc
Eighth major release of the classic Mac OS (1997)
support booting from HFS+ disks; the boot drive must be HFS. Mac OS 8.1 was the first system to have a Universal Disk Format (UDF) driver, allowing for
Mac_OS_8
Disk utility for macOS
range of formats to .dmg or, for CD/DVD images, .cdr Mount, unmount and eject disk volumes (including hard disks, removable media, and disk volume images)
Disk_Utility
DVD Recordable Dual Layer
stands for Double Layer), also called DVD+R9, is a derivative of the DVD+R format created by the DVD+RW Alliance. Its use was first demonstrated in October
DVD+R_DL
DVD format for storing high-fidelity audio
DVD-Audio (commonly abbreviated as DVD-A) is a digital format for delivering high-fidelity audio content on a DVD. DVD-Audio uses most of the storage on
DVD-Audio
Topics referred to by the same term
control system Live File System, Microsoft's implementation of Universal Disk Format (UDF) 2.5 in Windows Vista Log File System, Microsoft's NTFS log
LFS
Recordable optical disc specification
CD-R (Compact disc-recordable) is a digital optical disc storage format. A CD-R disc is a compact disc that can only be written once and read arbitrarily
CD-R
Read-only optical disc for high-fidelity audio storage
Super Audio CD (SACD) is an optical disc format for audio storage introduced in 1999. It was developed jointly by Sony and Philips Electronics and intended
Super_Audio_CD
Proprietary optical disc format developed by Sony for storing digital video
optical disc format introduced by Sony in 2003 primarily for XDCAM, its tapeless camcorder system. It was one of the first optical formats to utilize a
Professional_Disc
Data storage technology
have proved to be more reliable shorter-term data carriers than the floppy disk and DAT media they displaced. Sensitivity refers to the extent of refractive
Holographic_data_storage
DVD Recordable Dual Layer
stands for Dual Layer), also called DVD-R9, is a derivative of the DVD-R format standard. DVD-R DL discs hold 8.5 gigabyte (GB) by utilizing two recordable
DVD-R_DL
Video format standard for DVD+R and DVD+RW media
of the disc, until the disc is finalized. DVD-VR VR Mode DVD formats Universal Disk Format DVD+RW and DVD+R Philips DVDR3506 manual Philips DVD+RW Video
DVD+VR
Optical disc format based on HD DVD
September 2009, Universal Studios and National Geographic announced their support for the format. Also adding support for the format are Paramount Pictures
China Blue High-definition Disc
China_Blue_High-definition_Disc
Software development kit for the Xbox
hardware, and Xbox operating system specific limitations. UDF (Universal Disk Format) file system limitation: The Xbox only supports UDF version 1.02
Xbox_Development_Kit
Magneto-optical storage medium, mainly for audio (1992–2013)
– an RCA-developed format that uses a disc inside a sleeve, like MD Fidelipac Universal Media Disc (UMD) – a similar Sony format, but read-only. Used
MiniDisc
Free and open-source Unix-like operating system
published on the netbsd-user mailing list. A variety of "foreign" disk filesystem formats are also supported in NetBSD, including ZFS, FAT, NTFS, Linux ext2fs
NetBSD
Type of computer disk storage drive
disc and to record discs for archival and data exchange purposes. Floppy disk drives, with capacity of 1.44 MB, have been made obsolete: optical media
Optical_disc_drive
Storage with three-dimensional resolution for information
0) immersion lens, they have stored 1 TB as 200 layers in a 1.2 mm thick disk. They aim to improve capacity to >5 TB and data rates to up to 250 Mbit/s
3D_optical_data_storage
Variant of DVD designed with random access in mind
like a removable hard disk. Mac OS (8.6 or later) uses DVD-RAM directly. Windows XP uses DVD-RAM directly for FAT32-formatted discs only. Windows Vista
DVD-RAM
Content publishing on digital video discs, DVDs
particular book of DVD specifications from DVD Format/Logo Licensing Corporation. The different DVD formats have different books. Each book contains hundreds
DVD_authoring
system level, ISO 9660 or Universal Disk Format (UDF), no file pointers to the label area are present. At Physical Format Level, both the Inner Drive
LabelTag
Video disc player by Hasbro, 2003–2007
Hasbro Tiger Electronics Game Boy Advance Video Juice Box "Personal Video Disk (PVD) (2003 – 2006)". Museum Of Obsolete Media. 5 August 2013. Retrieved
VideoNow
Retrieved 2025-10-21. "XFS Adds Shared Data Extents For Linux 4.9". "Universal Disk Format Specification – Revision 2.60" (PDF). p. 34. This file, when small
Comparison_of_file_systems
Optical disc subdivision
Apple ISO 9660 Extensions Universal Disk Format (UDF) ISO 13490 See also History of optical storage media High-definition optical disc format war v t e
Track_(optical_disc)
Interactive multimedia and video gaming standard
Disc-Interactive (CD-I, later CD-i) is a digital optical disc data storage format as well as a hardware platform, co-developed and marketed by Dutch company
CD-i
Data storage format
Hi-MD is a magneto-optical disc-based data storage format. It was a further development of the MiniDisc. With its release in late 2004, came the ability
Hi-MD
Method used to identify optical discs
120 mm DVD - Read-Only Disk. DVD Forum. DVD Specification: Part 1, Annex K. Blu-ray Disc Association. BD ROM - Physical Format Specifications (March 2007)
Burst_cutting_area
Optical disc authoring software
possible to add files whose size exceeds 4 GiB (232 bytes) using the Universal Disk Format (UDF) to an image (or a disc, if invoked from growisofs). It automatically
Cdrkit
Flash file system
List of file systems Comparison of file systems Memory Stick XC Universal Disk Format The theoretical maximum volume size is defined by up to 232 − 11
ExFAT
Data storage device
to the reverse side of the disk.[citation needed] Optical discs can also be made in single-sided and double-sided formats, often as an alternative to
Double-sided_disk
Chinese optical disc format intended to replace DVD
Enhanced Versatile Disc (EVD) is an optical-medium-based digital audio/video format, developed by Beijing E-World (a multi-company partnership including SVA
Enhanced_Versatile_Disc
External floppy disk drive by Apple
5+1⁄4-inch flexible disk format. The Macintosh external drives were the first to widely introduce Sony's new 3+1⁄2-inch rigid disk standard commercially
Macintosh_External_Disk_Drive
File format for conveying binary information
Intel hexadecimal object file format, Intel hex format or Intellec Hex is a file format that conveys binary information in ASCII text form, making it
Intel_HEX
Electro-mechanical data storage device
A hard disk drive (HDD), hard disk, hard drive, or fixed disk is an electro-mechanical computer data storage device that stores and retrieves digital data
Hard_disk_drive
native Unix file systems. CDs, DVDs, and Blu-ray discs' ISO 9660 and Universal Disk Format (UDF) are supported. Unlike other operating systems, Linux and Unix
Comparison of Linux distributions
Comparison_of_Linux_distributions
Optical disc designed for the storage of digital video
Optical Disk Storage System For the Data Server Market". 2006. Retrieved 2006-08-25. "Plasmon Adopts New High Capacity 5.25 inch Optical Data Format" (PDF)
Ultra_Density_Optical
Protocol that carries SCSI commands over Parallel ATA
drives such as the Zip drive and SuperDisk drive. ATA was originally designed for, and worked only with, hard disks and devices that could emulate them
ATAPI
Hybrid analog video/digital audio format
CD Video (also known as CDV, CD-V, or CD+V) is a format of optical media disc that was introduced in 1987 that combines the technologies of standard compact
CD_Video
Specification Prefetcher ReadyBoost Sync Center Text Services Framework Universal Audio Architecture Windows Color System Windows Diagnostic Infrastructure
List of Microsoft Windows components
List_of_Microsoft_Windows_components
Optical disc format intended as an alternative to HD DVD and Blu-ray
Forward Versatile Disc (FVD) is an optical disc format developed in Taiwan as an offshoot of DVD technology. Jointly created by the Advanced Optical Storage
Forward_Versatile_Disc
Set of commands used for accessing multimedia features
Apple ISO 9660 Extensions Universal Disk Format (UDF) ISO 13490 See also History of optical storage media High-definition optical disc format war v t e
SCSI_Multimedia_Commands
original (PDF) on July 15, 2011. Retrieved January 14, 2011. "BIOS Enhanced Disk Drive Specification Version 3.0" (PDF). April 20, 1998. Archived from the
List_of_computer_standards
Data recovery utility by Cleverfiles
Sierra and later. Disk Drill can be also used as a backup utility for creating copies of the disk or partition in DMG images format. In February 2015
Disk_Drill
Optical data storage device
capacity of one such disk is 1 000 000 GB (1 PB), as storage occurs on 2 000 different levels layered inside the glass body of the disk. It claims to use
Hyper_CD-ROM
Software that supports computer infrastructure
a disk so that it can be used for a particular format. Can prepare a disk for initial use or erase the entire disk. Disk partitioner Divides an disk into
Utility_software
UNIVERSAL DISK-FORMAT
UNIVERSAL DISK-FORMAT
Boy/Male
Christian & English(British/American/Australian)
Ruler of People
Boy/Male
Swedish English
Fisherman.
Surname or Lastname
English
English : habitational name from Diss in Suffolk, which gets its name from a Norman pronunciation of Middle English diche, Old English dīc ‘ditch’, ‘dike’ (see Dyke).German : habitational name from Dissen near the Teutoburg forest.
Girl/Female
Norse
Spirited.
Girl/Female
Norse Greek
Spirited.
Boy/Male
German Teutonic American Dutch English
Dagger.
Boy/Male
Australian, British, English, Scandinavian
Fisherman; Fish
Boy/Male
American, Australian, British, Chinese, Christian, Danish, Dutch, English, French, German, Indian, Netherlands, Scandinavian, Swedish, Swiss, Teutonic
Ruler of the People; Form of Derek; First of the People; King of Nations
Surname or Lastname
English (East Anglia)
English (East Anglia) : metonymic occupational name for a fisherman or fish seller, or a nickname for someone supposedly resembling a fish in some way, from Old Norse fiskr ‘fish’ (cognate with Old English fisc).
Girl/Female
British, English
Direction
Boy/Male
American, Australian, British, Chinese, Christian, Danish, Dutch, English, French, German, Swedish, Teutonic
Rich and Powerful Ruler; Powerful; Rich Ruler; Dominant Ruler; Peaceful Ruler; Strong Power; Hardy Power; Powerful Ruler; Brave; First of the People
Male
English
 Short form of English Richard, DICK means "powerful ruler." Compare with another form of Dick.
Male
Egyptian
, the most lovely Disk.
Male
German
 Short form of German Diederick, DIRK means "first of the people; king of nations."
Boy/Male
Australian, Egyptian
Sun Disk
Boy/Male
Teutonic American English German Shakespearean
Rules the people.
Surname or Lastname
English and Scottish
English and Scottish : unexplained. The name has been recorded in Glastonbury, Somerset, since 1705.Perhaps a variant of Czech LiÅ¡ka, (see Liska), Slovak LÃÅ¡ka, or German Liske.
Male
Dutch
, people's ruler.
Male
Egyptian
, disk.
Girl/Female
Australian, Danish, Greek, Norse, Scandinavian, Swedish
Active Spirit; Goddess; Double
UNIVERSAL DISK-FORMAT
UNIVERSAL DISK-FORMAT
Girl/Female
Latin
Silver.
Boy/Male
Indian
Concealed, Veiled
Boy/Male
Australian, Christian, French
Place Name; The Beautiful Mountain
Girl/Female
Muslim
Hidden
Girl/Female
Hebrew
Cub.
Girl/Female
Australian, Kurdish, Turkish
Musical; Melody
Boy/Male
Arabic, Muslim
Weak
Girl/Female
American, British, English, Japanese
Bull; An Astrological Name; Feminine Form of Taurus; Many Rivers
Boy/Male
Hindu
Ocean of compassionate
Boy/Male
Indian, Kannada
Protector
UNIVERSAL DISK-FORMAT
UNIVERSAL DISK-FORMAT
UNIVERSAL DISK-FORMAT
UNIVERSAL DISK-FORMAT
UNIVERSAL DISK-FORMAT
a.
Of or pertaining to the universe; extending to, including, or affecting, the whole number, quantity, or space; unlimited; general; all-reaching; all-pervading; as, universal ruin; universal good; universal benevolence or benefice.
n.
A circular structure either in plants or animals; as, a blood disc, a germinal disc, etc. Same as Disk.
n.
A general abstract conception, so called from being universally applicable to, or predicable of, each individual or species contained under it.
n.
A flat, circular plate; as, a disk of metal or paper.
n.
The whole; the general system of the universe; the universe.
n.
The lower side of the body of some invertebrates, especially when used for locomotion, when it is often called a creeping disk.
adv.
In a universal manner; without exception; as, God's laws are universally binding on his creatures.
n.
To incur the risk or danger of; as, to risk a battle.
n.
The state of being concave, or like a dish, or the degree of such concavity; as, the dish of a wheel.
n.
To expose to risk, hazard, or peril; to venture; as, to risk goods on board of a ship; to risk one's person in battle; to risk one's fame by a publication.
v. t.
To make concave, or depress in the middle, like a dish; as, to dish a wheel by inclining the spokes.
a.
Forming the whole of a genus; relatively unlimited in extension; affirmed or denied of the whole of a subject; as, a universal proposition; -- opposed to particular; e. g. (universal affirmative) All men are animals; (universal negative) No men are omniscient.
n.
A universal proposition. See Universal, a., 4.
a.
Adapted or adaptable to all or to various uses, shapes, sizes, etc.; as, a universal milling machine.
v. t.
To make dusk.
n.
The food served in a dish; hence, any particular kind of food; as, a cold dish; a warm dish; a delicious dish. "A dish fit for the gods."
a.
Constituting or considered as a whole; total; entire; whole; as, the universal world.
v. i.
To grow dusk.
v. t.
To stab with a dirk.
n.
A circular structure either in plants or animals; as, a blood disk; germinal disk, etc.