10 letters · 16 points in Scrabble
noun the cup-shaped hollow in the hipbone into which the head of the femur fits to form a ball-and-socket joint
originLearned borrowing from Latin acētābulum (“vinegar saucer, 1/48 congius”), from acētum (“vinegar”) + -bulum (“-bule: a vessel for”).
Etymology from Wiktionary, CC BY-SA 3.0