acetabulum

• POS: Noun
• HYPHEN: ac=e=tab=u=lum

CIDE DICTIONARY

acetabulum, n. [L., a little saucer for vinegar, fr. acetum vinegar, fr. acere to be sour.].

•  A vinegar cup; socket of the hip bone; a measure of about one eighth of a pint, etc.  [1913 Webster]
•  The bony cup which receives the head of the thigh bone.  [1913 Webster]

OXFORD DICTIONARY

acetabulum, n. (pl. acetabula) Zool.
1 the socket for the head of the thigh-bone, or of the leg in insects.
2 a cup-shaped sucker of various organisms, including tapeworms and cuttlefish.

Etymology

ME f. L, = vinegar cup f. acetum vinegar + -abulum dimin. of -abrum holder