资料来源 : Webster's Revised Unabridged Dictionary (1913)

Sawtooth \Saw"tooth`\, n. (Zo["o]l.)
   An arctic seal ({Lobodon carcinophaga}), having the molars
   serrated; -- called also {crab-eating seal}.

资料来源 : WordNet®

crab-eating seal
     n : silvery gray Antarctic seal subsisting on crustaceans [syn:
         {crabeater seal}]