noun
ZoologyA member of the superfamily Physeteroidea, which includes the sperm whale, the pygmy and dwarf sperm whales (genus Kogia), and their fossil relatives.
adjective
ZoologyOf or relating to the superfamily Physeteroidea; resembling a sperm whale.
Origin
Late 19th century; earliest use found in Nature: a weekly journal of science. From physeter + -oid, after scientific Latin Physeteroidea, superfamily name.
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