8 letters · 13 points in Scrabble
adjective (of a leaf or bean shape) resembling the shape of kidney
originLearned borrowing from Latin rēnis (the genitive singular of rēn (“kidney”); see further at that entry) + English -form (suffix meaning ‘having the form or shape of’), modelled after New Latin rēnifōrmis (“of seeds: kidney-shaped”).
Etymology from Wiktionary, CC BY-SA 3.0