acetabulum

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Related to acetabula: hip joint

acetabulum

[‚a·sə′tab·yə·ləm]
(anatomy)
A cup-shaped socket on the hipbone that receives the head of the femur.
(invertebrate zoology)
A cavity on an insect body into which a leg inserts for articulation.
The sucker of certain invertebrates such as trematodes and tapeworms.
References in periodicals archive ?
Genital acetabula many pairs; female genital field with two pairs of acetabular plates; each anterior female acetabular plate with a very elongate, inner flap that is heavily sclerotized and bears one or two, short, thick, spinous, setae; posterior female plate modified and resembling that of Polyatax; pedipalp subcylindrical and well-sclerotized with tarsus rectangular and somewhat elongate with large, obvious clawlets; dorsum with obvious dorsal plates; male genital field as in Polyatax; male fourth walking leg apparently unmodified; bifid tarsal claws in all walking legs, while tarsal claws of second and third walking legs are obviously bifid to a lesser degree than those of the first and fourth walking legs; coxal plates with indistinct borders.
Male and female genital fields with five or six pairs of acetabula and resembling those of subgenus Unionicola; pedipalps slightly elongate and resembling those of subgenus Unionicolides Lundblad, 1937; first walking leg with a distinctive setal pattern that is less setose than that of the subgenus Unionicola.
Studies on dysplastic acetabula and congenital subluxation of the hip joint: With special reference to the complication of osteoarthritis.