| 单词 | passage form | 
| 释义 | > as lemmaspassage form   passage form  n. Biology a form that is intermediate or transitional between two species. ΚΠ 1865    Philos. Trans. 		(Royal Soc.)	 155 343  				This may be looked at as a passage-form from a simple Vaginulina..or it may be regarded as a medium between Cristellaria and Marginulina; and so leading to Nodosaria. 1901    Nature 3 Jan. 234/2  				He finds that..passage-forms prove to be the rule, while sharply-defined and typical species are the exception. 1940    F. F. Grout Kemp's Handbk. Rocks 		(ed. 6)	 iii. 66  				The mineral sodalite may develop and yields sodalite syenites which are passage forms to nepheline syenites. < as lemmas  | 
	
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