Etymology
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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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Definitions of dehiscence

dehiscence (n.)
(biology) release of material by splitting open of an organ or tissue; the natural bursting open at maturity of a fruit or other reproductive body to release seeds or spores or the bursting open of a surgically closed wound;
From wordnet.princeton.edu