| 释义 | ac·e·tab·u·lum \ˌasəˈtabyələm\ noun
 (plural acetabulums \-ləmz\ ; or acetabu·la \-lə\)
 Etymology: Latin, from acetum vinegar — more at acetic
 1.  : a little cup used in ancient Rome to hold vinegar or sauce at the table
 2.
 a.  : the cup-shaped socket in the hipbone that receives the head of the thigh bone
 b.  : the cavity into which the leg of an insect is inserted at its articulation with the body
 3. [New Latin, from Latin]  : one of the cotyledons or lobes of the placenta in ruminating animals
 4. [New Latin, from Latin]  : a sucker of certain invertebrates: as
 a.  : a ventral sucker of many trematodes
 b.  : one of the suckers on the scolex of a tapeworm
 c.  : the posterior sucker of a leech
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