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Webster 1913 Edition

Adj.

[Gr.

ἐκτόσ

outside + [GREEK] 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.