BLASTOSPHERE

blastula, blastosphere

(noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs

Source: WordNet® 3.1


Etymology

Noun

blastosphere (plural blastospheres)

A blastula

Source: Wiktionary


Blas"to*sphere, n. Etym: [Gr. sprout + E. sphere.] (Biol.)

Definition: The hollow globe or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum.

Note: [See Illust. of Invagination.]

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

4 April 2025

GUILLOTINE

(verb) kill by cutting the head off with a guillotine; “The French guillotined many Vietnamese while they occupied the country”


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