ectoderm, exoderm, ectoblast
(noun) the outer germ layer that develops into skin and nervous tissue
Source: WordNet® 3.1
ectoblast (plural ectoblasts)
(dated, biology) The outer layer of the blastoderm; the ectoderm or epiblast.
Source: Wiktionary
Ec"to*blast, n. Etym: [Ecto- + Gr. (Biol.) (a) The outer layer of the blastoderm; the epiblast; the ectoderm. (b) The outer envelope of a cell; the cell wall. Agassiz.
Source: Webster’s Unabridged Dictionary 1913 Edition
1 April 2025
(adverb) at the present or from now on; usually used with a negative; “Alice doesn’t live here anymore”; “the children promised not to quarrel any more”
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