1. The anterior part of the stomach of a bird, where digestive enzymes are secreted. Food passes from the proventriculus to the gizzard.
2. See gastric mill.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。