Chiefly Zoology. The opening or gape of the mouth. Also: the edge of the opening of the mouth; spec. the angle of the mouth.
| 单词 | θ36558 | 
| 释义 | the world > animals > fish > parts of fish > 			[noun]		 > mouth or jaw > expanse of mouth (1)		 rictus1776 Chiefly Zoology. The opening or gape of the mouth. Also: the edge of the opening of the mouth; spec. the angle of the mouth. | 
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