Word Study
ectental
CIDE DICTIONARY
ectental, a. [Gr. 'ekto`s outside + inside.].
Relating to, or connected with, the two primitive germ layers, the ectoderm and ectoderm; as, the “ectental line” or line of juncture of the two layers in the segmentation of the ovum. C. S. Minot. [1913 Webster]
For further exploring for "ectental" in Webster Dictionary Online