prostomium中文什么意思

n.
(pl. -mia ) 【动物；动物学】口前叶。

百科释义

Prostomium (sometimes also called acron) is the first body segment in an annelid worms body in the anterior end. It is in front of (but does not include) the mouth, being usually a small shelf- or lip-like extension over the dorsal side of the mouth.