9 letters · 15 points in Scrabble
adjective (of e.g. fruits and anthers) opening spontaneously at maturity to release seeds
originLearned borrowing from Latin dehīscentem, present participle of dehīscō (“to divide, split open, gape”), from hīscō (“to yawn, gape”).
Etymology from Wiktionary, CC BY-SA 3.0