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Genus of mammals
Physeter is a genus of toothed whales. There is only one living species in this genus: the sperm whale (Physeter macrocephalus). Some extremely poorly
Physeter
Largest species of toothed whale
(Physeter macrocephalus) is the largest of the toothed whales and the largest toothed predator. It is the only living member of the genus Physeter and
Sperm_whale
Rock formation of the Palmer Archipelago
Physeter Rocks (63°31′S 60°9′W / 63.517°S 60.150°W / -63.517; -60.150) is a small group of rocks lying to the west of Ohlin Island, Palmer Archipelago
Physeter_Rocks
Superfamily of toothed whales
includes three extant species of whales: the sperm whale, in the genus Physeter, and the pygmy sperm whale and dwarf sperm whale, in the genus Kogia. In
Physeteroidea
Cetaceans claimed to exist
dorsal fins was similar to a "mizzen mast". Carl Linnaeus listed Physeter microps and Physeter tursio as High-finned sperm whales in the 10th edition of Systema
Cryptid_whale
Sperm whale that inspired the novel Moby Dick
dɪk/; died 1838) was an albino (or possibly leucistic) male sperm whale (Physeter macrocephalus) that lived in the southeastern Pacific Ocean in the early
Mocha_Dick
Predatory grouping of extinct whales
were used in capturing large prey. In contrast, the modern sperm whale (Physeter macrocephalus) lacks enamel, teeth in the upper jaw, and the ability to
Macroraptorial_sperm_whale
Extinct genus of sperm whale from the Miocene epoch
meters (44–57 ft) long. Comparable to that of the modern sperm whale (Physeter macrocephalus), making it one of the largest predators known. The teeth
Livyatan
Subfamily of whales
subfamily of whales in the family Physeteridae. It contains one extant genus, Physeter (sperm whales), and nine extinct genera (five of which are considered nomen
Physeterinae
Taxonomic rank above species and below family
Species presently lists 8 genus-level synonyms for the sperm whale genus Physeter Linnaeus, 1758, and 13 for the bivalve genus Pecten O.F. Müller, 1776.
Genus
Species of whale
side, and a spermaceti organ. He named it Physeter (Euphysetes) simus, the same genus as the sperm whale (Physeter macrocephalus) and the pygmy sperm whale
Dwarf_sperm_whale
Species of oceanic dolphin in the genus Pseudorca
tuna purse-seine fishing operations; there are attacks on sperm whales (Physeter macrocephalus), and one instance against a humpback whale (Megaptera novaeangliae)
False_killer_whale
Waxy substance found in the head cavities of sperm whales
"A Theory for the Function of the Spermaceti Organ of the Sperm Whale (Physeter Catodon L.)" (PDF). Nasa, Washington Animal Orientation and Navigation
Spermaceti
Extinct genus of mammals
newly erected genus Albicetus. Albicetus, unlike the modern sperm whale (Physeter macrocephalus), possessed functional and enamel-coated teeth in both jaws
Albicetus
Term used in biodiversity informatics
sometimes the year of publication of the name. As an example, the sperm whale, Physeter catodon, was first described by Carl Linnaeus in his landmark 1758 10th
Chresonym
Informal group of large marine mammals
Whitehead H, Barlow J, Dawson SM, Eguiguren A, Miller B, Shabangu, F (2025). "Physeter macrocephalus". IUCN Red List of Threatened Species. 2025. e.T41755A50382216
Whale
Parvorder of cetaceans
P. L. (1993). "Pattern similarity in shared codas from sperm whales (Physeter catodon)". Marine Mammal Science. 9 (1): 1–9. Bibcode:1993MMamS...9...
Toothed_whale
Species of mammal
whale and assigned it to the same genus as the sperm whale (Physeter macrocephalus) as Physeter breviceps. He noted its small size and nicknamed it "cachalot
Pygmy_sperm_whale
Human hunting of sperm whales
Mead, J.G.; Notarbartolo di Sciara, G.; Wade, P. & Pitman, R.L. (2008). "Physeter macrocephalus". IUCN Red List of Threatened Species. 2008 e.T41755A10554884
Sperm_whaling
Family of roundworms
several meters long and has been found in the placenta of the sperm whale (Physeter macrocephalus). The Tetrameridae number about half a dozen genera only
Tetrameridae
Infraorder of marine mammals
Simkus G, Zölzer U (March 2015). "Estimating the number of sperm whale (Physeter macrocephalus) individuals based on grouping of corresponding clicks".
Cetacean
Extinct genus of toothed whale (fossil)
Greek word brygmos, which means "biting" or "gnashing", combined with physeter, which is the generic name of the living sperm whale, and also means "blower"
Brygmophyseter
Small cetacean of the family Phocoenidae
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Porpoise
Species of cephalopod
(5 April 2019). "Diet and mitochondrial DNA haplotype of a sperm whale (Physeter macrocephalus) found dead off Jurong Island, Singapore". PeerJ. 7 e6705
Seven-arm_octopus
Extinct genus of sperm whales
functional in both the upper and lower jaws which the modern sperm whale (Physeter macrocephalus) lacks. It also had a beak, the ability to echolocate prey
Zygophyseter
Largest living species of dolphin
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Orca
Species of mammal
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Common_dolphin
Marine mammals of the Mediterranean Sea
(Globicephala melas), Cuvier's beaked whale (Ziphius cavirostris), sperm whale (Physeter macrocephalus) and fin whale (Balaenoptera physalus). Their distribution
Mediterranean_cetaceans
Species of roundworm
parasitic infections and faecal microbes in free-ranging sperm whales (Physeter macrocephalus) from the Mediterranean Sea". Parasitology Research. 117
Placentonema_gigantissima
Pseudorca crassidens NT Family: Physeteridae (sperm whales) Genus: Physeter Sperm whale, Physeter macrocephalus VU Family: Kogiidae Genus: Kogia Pygmy sperm whale
List_of_mammals_of_Ireland
Species of cephalopod
predated by Northern bottlenose whale (Hyperoodon ampullatus), Sperm whale (Physeter macrocephalus), Blue shark (Prionace glauca), Swordfish (Xiphias gladius)
Histioteuthis_bonnellii
Part of a sperm whale
to be involved in the generation of sound. In the modern sperm whale (Physeter macrocephalus), this organ is far larger in proportion to the animal's
Spermaceti_organ
Species of whale; largest animal known
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Blue_whale
Extinct genus of beaked whale
†Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia
Izikoziphius
Oceanic division
(Dugong dugon) Equatorial Indian Ocean and Pacific Decreasing Sperm whale (Physeter macrocephalus) Global Unknown Fin whale (Balaenoptera physalus) Global
Indian_Ocean
Species of whale
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Cuvier's_beaked_whale
1991 conservation agreement
(Odontoceti) in the Agreement Area, with the exception of the sperm whale (Physeter macrocephalus). Numerous species of small cetaceans live in the Baltic
Agreement_on_the_Conservation_of_Small_Cetaceans_of_the_Baltic,_North_East_Atlantic,_Irish_and_North_Seas
macaque (Macaca arctoides) Marbled cat (Pardofelis marmorata) Sperm whale (Physeter macrocephalus) Rusty-spotted cat (Prionailurus rubiginosus) Indian rhinoceros
List of endangered animals in India
List_of_endangered_animals_in_India
Village in Naxos, Greece
(1936–2014), Army officer Caretta caretta. Apeiranthos Natural History Museum Physeter macrocephalus. Apeiranthos Natural History Museum Monachus monachus. Apeiranthos
Apeiranthos
Mammals in Carl Linnaeus's classification
blue whale Physeter – sperm whales and cryptid whales Physeter catodon – either Beluga or sperm whale Physeter macrocephalus sperm whale Physeter miscrops
Mammalia in the 10th edition of Systema Naturae
Mammalia_in_the_10th_edition_of_Systema_Naturae
Genus of dolphins in the order Cetacea
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Pilot_whale
Species of cephalopods
(5 April 2019). "Diet and mitochondrial DNA haplotype of a sperm whale (Physeter macrocephalus) found dead off Jurong Island, Singapore". PeerJ. 7 e6705
Taningia_danae
Species of beaked whale
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Spade-toothed_whale
Family of mammals
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Beaked_whale
Orcinus orca DD Family: Physeteridae (sperm whales) Genus: Physeter Sperm whale, Physeter macrocephalus EN Family: Ziphiidae (beaked whales) Genus: Ziphius
List_of_mammals_of_Sardinia
Family of crustaceans
1365-294X.2005.02664.x. PMID 16156814. P. B. Best (1969). "The sperm whale (Physeter catodon) off the west coast of South Africa. 3. Reproduction in the male"
Whale_louse
Topics referred to by the same term
colloquial or as a quasi-scientific term. In whaling jargon, the sperm whale (Physeter macrocephalus) of the Physeteridae was sometimes known as the "black whale"
Black_whale
Extinct genus of whales
†Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia
Pterocetus
Species of mammal
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Indo-Pacific_humpback_dolphin
Extinct genus of sperm whales
describes the short, pointed, upturned snout—and physeter—which is the genus name for the modern sperm whale Physeter macrocephalus. The species name deinodon
Acrophyseter
Canadian biologist
Whitehead is a biologist specializing in the study of the sperm whale (Physeter macrocephalus). Whitehead is professor at Dalhousie University. The primary
Hal_Whitehead
possibly present Suborder: Odontoceti Family: Physeteridae Genus: Physeter Sperm whale, Physeter macrocephalus VU Family: Ziphidae Genus: Ziphius Cuvier's beaked
List_of_mammals_of_Syria
Tursiops truncatus LC Family: Physeteridae (sperm whales) Genus: Physeter Sperm whale, Physeter macrocaphalus VU Family: Kogiidae (dwarf sperm whales) Genus:
List_of_mammals_of_Haiti
White whale, Delphinapterus leucas Narwhal, Monodon monoceros Sperm whale, Physeter macrocephalus Common porpoise, Phocoena phocoena Short-beaked common dolphin
List_of_mammals_of_Norway
Kogia Family: Phocoenidae Genus: Neophocaena Family: Physeteridae Genus: Physeter Family: Ziphiidae Genus: Indopacetus Mesoplodon Ziphius Order: Chiroptera
List_of_mammals_of_Kerala
musculus EN IUCN Humpback whale Megaptera novaeangliae LC IUCN Sperm whale Physeter macrocephalus VU IUCN Orca Orcinus orca DD IUCN Spinner Dolphin Stenella
List of animals in the Galápagos Islands
List_of_animals_in_the_Galápagos_Islands
Tursiops truncatus Family: Physeteridae (sperm whales) Genus: Physeter Sperm whale, Physeter catodon DD Family: Kogiidae (dwarf sperm whales) Genus: Kogia
List_of_mammals_of_Nicaragua
whale, Kogia sima DD Family: Physeteridae (sperm whales) Genus: Physeter Sperm whale, Physeter macrocephalus VU Family: Ziphiidae (beaked whales) Genus: Hyperoodon
List_of_mammals_of_the_Azores
Submarine canyon
cold waters that can date back to more than 8,000 years ago. Sperm whale (Physeter macrocephalus) Source: Henricia caudani Henricia sexradiata Myxaster perrieri
Avilés_Canyon
Monodon Narwhal, Monodon monoceros LC Family: Physeteridae Genus: Physeter Sperm whale, Physeter macrocephalus VU There are over 260 species of carnivorans,
List_of_mammals_of_Iceland
borealis) 368 374 371 Whale (Orca) (Orcinus orca) 473 567 532 Whale (Sperm) (Physeter catodon) 480 590 535 Whale (Spinner dolphin) (Stenella longirostris) 318
List of mammalian gestation durations
List_of_mammalian_gestation_durations
Species of marine mammal
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Risso's_dolphin
population) Suborder: Odontoceti Family: Physeteridae Genus: Physeter Sperm whale, Physeter macrocephalus VU Family: Ziphidae Genus: Ziphius Cuvier's beaked
List_of_mammals_of_Egypt
Kogiidae least concern Kogia simus dwarf sperm whale Kogiidae least concern Physeter macrocephalus sperm whale cachalot Physeteridae vulnerable Ziphius cavirostris
List_of_mammals_of_Maryland
porpoise, Phocoena phocoena VU Family: Physeteridae Genus: Physeter Sperm whale, Physeter macrocephalus VU Family: Kogiidae Genus: Kogia Pygmy sperm whale
List_of_mammals_of_Ghana
porpoise, Phocoena phocoena LC Family: Physeteridae Genus: Physeter Sperm whale, Physeter macrocephalus VU Family: Kogiidae Genus: Kogia Pygmy sperm whale
List_of_mammals_of_Liberia
porpoise, Phocoena phocoena Physeteridae Sperm whale (ᑭᒍᑎᓕᒃ, kigutilik) Physeter macrocephalus Ziphiidae Northern bottlenose whale, Hyperoodon ampullatus
List_of_mammals_of_Nunavut
Extinct genus of mammals
†Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia
Diaphorocetus
harbour porpoise, P. p. phocoena Family: Physeteridae Genus: Physeter Sperm whale, Physeter macrocephalus VU Family: Ziphidae Subfamily: Hyperoodontinae
List_of_mammals_of_Greenland
2001 video game
Enhydra lutris nereis Shortfin mako shark Isurus oxyrinchus Sperm whale Physeter macrocephalus Tiger shark Galeocerdo cuvier Walrus Odobenus rosmarus divergens
Zoo_Tycoon_(2001_video_game)
Genus of squids
(5 April 2019). "Diet and mitochondrial DNA haplotype of a sperm whale (Physeter macrocephalus) found dead off Jurong Island, Singapore". PeerJ. 7 e6705
Ancistrocheirus
Extinct family of mammals
†Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia
Waipatiidae
Tursiops truncatus Family: Physeteridae (sperm whales) Genus: Physeter Sperm whale, Physeter catodon DD Family: Kogiidae (dwarf sperm whales) Genus: Kogia
List_of_mammals_of_Panama
Intellectual capacity of cetaceans
as a more accurate indicator of an animal's intelligence. Sperm whales (Physeter macrocephalus) have the largest known brain mass of any extant animal,
Cetacean_intelligence
tusks with the right significantly longer than the left. The sperm whale (Physeter macrocephalus) has a single nostril on its upper left head. The right nostril
List of animals featuring external asymmetry
List_of_animals_featuring_external_asymmetry
Species of mammal
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Short-finned_pilot_whale
British Overseas Territory in the Caribbean
Blainville's beaked whale (Mesoplodon densirostris) and sperm whale (Physeter macrocephalus). Cayman avian fauna includes two endemic subspecies of Amazona
Cayman_Islands
Superfamily: Platanistoidea Family: Physeteridae Genus: Physeter (sperm whales) Sperm whale, Physeter macrocephalus VU Family: Kogiidae Genus: Kogia (pygmy
List_of_mammals_of_Belgium
Small fossil whale from Italy
Hemisyntrachelus, G. etruriae, the baleen whale Balaena paronai, the sperm whale (Physeter macrocephalus), the Mesoplodon beaked whales M. lawleyi and M. danconae
Kogia_pusilla
Adaptations of marine vertebrates to diving
(Physeter macrocephalus) is the largest of the toothed whales and the largest toothed predator. It is the only living member of the genus Physeter and
Physiology of underwater diving
Physiology_of_underwater_diving
Extinct genus of whales
internal process of the sort present in the modern day genus of sperm whale (Physeter). "Contributions to Palaeontology from the Carnegie Institution of Washington"
Idiophyseter
Sleep in which half the brain remains alert
crassidens) Porpoise (Phocoena phocoena) Orca (Orcinus orca) Sperm whale (Physeter macrocephalus) Though pinnipeds are capable of sleeping on either land
Unihemispheric slow-wave sleep
Unihemispheric_slow-wave_sleep
Extinct genus of mammals
†Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia
Goedertius
Extinct family of dolphins
†Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia
Albireonidae
Island in the Indian Ocean
olive ridley turtle (Lepidochelys oliveacea) – possible; sperm whale (Physeter macrocephalus) – possible; sei whale (Balaeonoptera borealis) – possible;
Diego_Garcia
Extinct genus of mammals
†Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia
Xenorophus
Pharomachrus mocinno Phocoena sinus Phoebastria albatrus Phragmipedium spp. Physeter macrocephalus Picathartes gymnocephalus Picathartes oreas Pilgerodendron
List of species protected by CITES Appendix I
List_of_species_protected_by_CITES_Appendix_I
Tursiops truncatus LC Family: Physeteridae (sperm whales) Genus: Physeter Sperm whale, Physeter catodon VU Family: Balaenidae (right whales) Genus: Eubalaena
List_of_mammals_of_Tasmania
Medium-sized toothed whale species
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Narwhal
(Kogia breviceps) Dwarf sperm whale (Kogia simus) Physeteridae Sperm whale (Physeter macrocephalus) Procyonidae Raccoon (Procyon lotor) Sciuridae Southern flying
List of mammals of South Carolina
List_of_mammals_of_South_Carolina
Peponocephala Melon-headed whale, Peponocephala electra LC Genus: Physeter Sperm whale, Physeter macrocephalus VU Genus: Pseudorca False killer whale, Pseudorca
List of mammals of Timor-Leste
List_of_mammals_of_Timor-Leste
Third-largest species of baleen whale
feeding and reproduction in large baleen whales (Mysticeti) and sperm whales Physeter macrocephalus in Norwegian and adjacent waters". Fauna Norvegica Series
Sei_whale
Prehistoric cetacean genus
†Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia
Nihohae
Species of whale
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Minke_whale
Extinct genus of river dolphin
†Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia
Squalodelphis
acutorostrata LC Suborder: Odontoceti Family: Physeteridae Genus: Physeter Sperm whale, Physeter macrocephalus VU Superfamily: Platanistoidea Family: Ziphidae
List_of_mammals_of_Italy
borealis EN Southern fin whale, Balaenoptera physalus quoyi EN Sperm whale, Physeter macrocephalus VU Dwarf sperm whale, Kogia sima LR/lc Blainville's beaked
Wildlife_of_Réunion
Family of marine mammals
(P. spinipinnis) Phocoenoides Dall's porpoise (P. dalli) Physeteridae Physeter Sperm whale (P. macrocephalus) Kogiidae Kogia Pygmy sperm whale (K. breviceps)
Oceanic_dolphin
Extinct genus of toothed whale from the Miocene
†Cozzuoliphyseter †Diaphorocetus †Eophyseter †Idiophyseter †Idiorophus †Orycterocetus Physeter †Physeterula †Placoziphius †Thalassocetus? Platanistoidea †Aondelphis †Aureia
Amphidelphis
novaeangliae LC Parvorder: Odontoceti Family: Physeteridae Genus: Physeter Sperm whale, Physeter macrocephalus VU Family: Ziphidae Genus: Berardius Arnoux's
List_of_mammals_of_Antarctica
PHYSETER
PHYSETER
PHYSETER
PHYSETER
Girl/Female
American, Australian, British, English, French, Italian, Latin, Polish, Portuguese, Romanian, Spanish
Dedicated to God Mars; God Mars; Female Version of Marcellus; Little Marcus; Warlike; Warring
Boy/Male
Tamil
Calm, Unmovable, Unshakable
Boy/Male
Tamil
Sweet caring
Boy/Male
Hindu
Boy/Male
Hindu, Indian, Sanskrit
Not Terrible
Girl/Female
Indian, Sanskrit
Scholar
Girl/Female
Tamil
Name of Hindu Goddess Lakshmi ji
Girl/Female
Hindu
Aspirant, Flow
Male
Native American
Native American Algonquin name MAKKAPITEW means "he has large teeth."
Boy/Male
Irish
Fawn.
PHYSETER
PHYSETER
PHYSETER
PHYSETER
PHYSETER
n.
The genus that includes the sperm whale.
n.
A filtering machine operated by air pressure.
n.
A substance of the consistence of wax, found floating in the Indian Ocean and other parts of the tropics, and also as a morbid secretion in the intestines of the sperm whale (Physeter macrocephalus), which is believed to be in all cases its true origin. In color it is white, ash-gray, yellow, or black, and often variegated like marble. The floating masses are sometimes from sixty to two hundred and twenty-five pounds in weight. It is wholly volatilized as a white vapor at 212¡ Fahrenheit, and is highly valued in perfumery.
n.
The sperm whale (Physeter macrocephalus). It has in the top of its head a large cavity, containing an oily fluid, which, after death, concretes into a whitish crystalline substance called spermaceti. See Sperm whale.