n.（=narwal）一角鲸，独角鲸（一种齿鲸，雄性有一长牙）

英文释义

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.

词干

narwhal 独角鲸
→ 来自挪威语narhval，来自nar，浮尸，hval，鲸，即whale.因这种鲸的颜色形如浮尸的苍白色而得名。