ectental

[医] 外[及]内胚层的

释义与例句

adj.
  1. 1.

    Relating to, or connected with, the two primitive germ layers, the ectoderm and endoderm.

    生物

    the ectental line, or line of juncture of the two layers in the segmentation of the ovum

词源

From ecto- + endo- + -al.

来源：wiktionary