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Webster 1913 Edition

Ectoblast

Ec′to-blast

,

Noun.

[

Ecto-

+ Gr. [GREEK] bud, germ.]

(Biol.)

(a)

The outer layer of the blastoderm; the epiblast; the ectoderm.

(b)

The outer envelope of a cell; the cell wall.

Agassiz.