mesectodermWiktionary 原文构词拆分meso-前缀Middle or centre in location/position. · Between a macro- scale and micro- scale in scope or analysis.+ectoderm词根/词干词源说明From meso- + ectoderm.释义（英文）名词 NounThe region involved in the separation of mesoderm and ectoderm词族派生词（1）mesectodermal