| Narwhal (n.) An arctic cetacean (Monodon monocerous), about twenty feet long. The male usually has one long, twisted, pointed canine tooth, or tusk projecting forward from the upper jaw like a horn, whence it is called also sea unicorn, unicorn fish, and unicorn whale. Sometimes two horns are developed, side by side. Thesaurus Entries Loch Ness monster, alevin, baleen whale, beluga, benthon, benthos, blackfish, blue whale, cachalot, dolphin, finback, fingerling, fish, fry, game fish, grilse, humpback, killer, killer whale, kipper, man-eater, man-eating shark, marine animal, minnow, minny, narwhal, nekton, panfish, plankton, porpoise, salmon, sea monster, sea pig, sea serpent, sea snake, shark, smolt, sperm whale, sponge, sulfur-bottom whale, tropical fish, whale |