preoral
/pree-awr-uhl, -ohr-/US // priˈɔr əl, -ˈoʊr- //
口腔前,口前,口述前,口腔前言
Definitions
adj.形容词 adjective
- 1
Zoology.
- : situated in front of or before the mouth.
Examples
The cilia of the preoral and postoral bands are not clearly differentiated at this stage.
At the anterior end of the preoral lobe is a nervous thickening of the ectoderm called 226 the apical plate .
Prostomium: The region in front of the mouth; the preoral part of the head.
To the right of this adoral zone is a single line of preoral cilia.
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