Embryology. Of a part or structure: in the first or an early stage of embryonic development.
| 单词 | θ17849 | 
| 释义 | the world > life > biology > organism > 			[adjective]		 > ultimate element of (1)		 primitive1884 Embryology. Of a part or structure: in the first or an early stage of embryonic development.  | 
	
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