资料来源 : pyDict

锯齿,锐齿

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®

sawtooth
     n : a serration on a saw blade