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

Mouthless \Mouth"less\, a. [AS. m[=u][eth]le['a]s.]
   Destitute of a mouth.

资料来源 : WordNet®

mouthless
     adj : having no mouth or mouthlike opening [syn: {astomatous}]
           [ant: {stomatous}]