| 单词 | histogen | 
| 释义 | histogen in British English (ˈhɪstəˌdʒɛn) noun (formerly) any of three layers in an apical meristem that were thought to give rise to the different parts of the plant: the apical meristem is now regarded as comprising two layers  corpus, tunicahistogen in American English (ˈhɪstədʒən)  noun   Botany   a group of cells that gives rise to new tissue, such as cambium, cork cambium, etc.  Derived forms  histogenic (ˌhistoˈgenic) (ˌhɪstoʊˈdʒɛnɪk)  adjective Word origin  histo- +  -gen | 
	
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