Porpoise
WordNet
noun
(1) Any of several small gregarious cetacean mammals having a blunt snout and many teeth
WiktionaryText
Etymology
From Old French pourpois, from Vulgar Latin porcopiscis, pisciporcus 'swine fish' (cf. obsolete Italian pesce porco, Portuguese peixe porco), for Latin porcus marinus 'sea hog', akin in formation to German Meerschwein.
Noun
- A small cetacean of the family Phocoenidae, related to whales and dolphins.
- Any small dolphin.
Verb
- Said of an aircraft: to make a series of plunges when taking off or landing.