"killer whale," introduced as a generic term for the species by 1841, from earlier use in scientific names, from Latin
orca
"cetacean, a kind of whale." Earlier in English,
orc, ork
"large marine mammal, deadly sea-creature" (by mid-17c.), from French
orque
, had been used vaguely of sea monsters (see
orc
). Strong, ferocious, and predatory, they are the only cetaceans which habitually prey upon warm-blooded animals.