physeteroid
/fʌɪˈsiːtərɔɪd/Zoology
noun
A member of the superfamily Physeteroidea, which includes the sperm whale, the pygmy and dwarf sperm whales (genus Kogia), and their fossil relatives.
adjective
Of 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.