proctodeum / ˌprɒk təˈdi əm /

📖毕业后词汇肛门肛门部肛门镜肛门癌

proctodeum 的定义

n. 名词 noun

plural proc·to·de·a [prok-tuh-dee-uh], /ˌprɒk təˈdi ə/, proc·to·de·ums.Embryology.

  1. a depression in the ectoderm of the anal region of a young embryo, which develops into part of the anal canal.