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B_______
Definitions
An early hollow ball-like stage of an embryo.
Word origin
From New Latin blastula, diminutive of Ancient Greek βλαστός (blastós, “a germ, bud, sprout, shoot”), from βλαστάνω (blastánō, “to bud, sprout, grow, properly of plants, but also of animals”).
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
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