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mor·pho·gen AHD[môrʹfō-jĕn'] D.J.[ˈmɔːfəʊˌdʒen]K.K.[ˈmɔrfoˌdʒɛn]n.（名词）- Any of various chemicals in embryonic tissue that influence the movement and organization of cells during morphogenesis by forming a concentration gradient.构形素，定形素：在形态发生过程中通过形成浓度梯度从而对细胞的运动和组织产生影响的胚胎组织中多种化学品的任何一种
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