| 单词 | extra-embryonic | 
| 释义 | > as lemmasextra-embryonic   extra-embryonic adj.  Brit.  , U.S.   outside the embryo.ΚΠ 1913    W. A. N. Dorland Illustr. Med. Dict. 		(ed. 7)	 348/2  				Extra-embryonic, not a part of the embryo proper: applied to that portion of the embryo outside of the umbilical stalk. 1958    New Biol. 26 24  				The extra~embryonic part of the blastoderm soon becomes divided into chorion and yolk sac. < as lemmas  | 
	
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