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dehiscence (n.)

"a gaping," in botany, "the discharge of seeds or pollen," 1828, from Modern Latin dehiscentia, from dehiscentem (nominative dehiscens), present participle of dehiscere "to gape, open, split down" (of the earth, etc.), from de- (see de-) + hiscere, inchoative of hiare "to yawn" (see yawn (v.)). Related: Dehisce (1650s); dehiscent (1640s).

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