Hypertext Webster Gateway: "acetabulum"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Acetabulum \Ac`e*tab"u*lum\, n. [L., a little saucer for
vinegar, fr. acetum vinegar, fr. acere to be sour.]
1. (Rom. Antiq.) A vinegar cup; socket of the hip bone; a
measure of about one eighth of a pint, etc.
2. (Anat.)
(a) The bony cup which receives the head of the thigh
bone.
(b) The cavity in which the leg of an insect is inserted
at its articulation with the body.
(c) A sucker of the sepia or cuttlefish and related
animals.
(d) The large posterior sucker of the leeches.
(e) One of the lobes of the placenta in ruminating
animals.
From WordNet (r) 1.7 (wn)
acetabulum
n : the cup-shaped hollow in the hipbone into which the head of
the femur fits to form a ball-and-socket joint [syn: {cotyloid
cavity}]
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