| 单词 | proventriculus | 
| 释义 | proventriculus [´prō·vǝn`trik·yǝ·lǝs]  INVERTEBRATE ZOOLOGY 1. A sac anterior to the gizzard in earthworms.  2. A dilation of the foregut anterior to the midgut of Mandibulata.  VERTEBRATE ZOOLOGY The true stomach of a bird, usually separated from the gizzard by a constriction.  | 
	
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