| 单词 | proctodeum |
| 释义 | proctodeum —proctodeal, adj. /prok'teuh dee"euhm/, n. , pl. proctodea /-dee"euh/, proctodeums. Embryol. a depression in the ectoderm of the anal region of a young embryo, which develops into part of the anal canal. [1875-80; < NL < Gk prokt- PROCT- + NL -odeum < Gk hodaîon, neut. of hodaîos on or by the way; see -ODE2, -EUM] |
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