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Ectental
Ectental Ec*ten"tal, a. [Gr. ? 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.
Meaning of Ectental from wikipedia