A rounded, slit-like, or closed opening in the pedicle valve of a brachiopod (Brachiopoda) for the passage of the pedicle to the exterior.
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。