| 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 layerscorpus, tunica histogen in American English (ˈhɪstədʒən)  noun  Botany   a group of cells that gives rise to new tissue, such as cambium, cork cambium, etc. Derived formshistogenic (ˌhistoˈgenic) (ˌhɪstoʊˈdʒɛnɪk)  adjective Word originhisto- +  -gen | 
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