Illustration of dolphin
 - dolphin 1a
 
| 单词 | dolphin | 
| 释义 | dolphinnoun  dol·phin  ˈdäl-fən   ˈdȯl-   1   a     : any of various small marine toothed whales (family Delphinidae) with the snout more or less elongated into a beak and the neck vertebrae partially fused  Note: While not closely related, dolphins and porpoises share a physical resemblance that often leads to misidentification. Dolphins typically have cone-shaped teeth, curved dorsal fins, and elongated beaks with large mouths, while porpoises have flat, spade-shaped teeth, triangular dorsal fins, and shortened beaks with smaller mouths.  b     : any of several related chiefly freshwater toothed whales (as of the families Platanistidae and Iniidae) : river dolphin   2    : dolphinfish   3   capitalized  : delphinus   4    : a spar or buoy for mooring boats    also : a cluster of closely driven piles used as a fender for a dock or as a mooring or guide for boats    | 
	
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