The Collaborative International Dictionary
Ectental
Ectental \Ec*ten"tal\, a. [Gr. 'ekto`s outside + ? inside.]
(Biol.)
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.
Wiktionary
ectental
a. (context biology English) Relating to, or connected with, the two primitive germ layers, the ectoderm and endoderm.