coxa

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coxa Uppermost joint of the leg of an insect, which articulates with the thorax proximally, and with the trochanter distally. The coxa is usually a stout, truncated cone of cuticle, freely mobile with respect to the thorax; but in Lepidoptera the middle and hind coxae are fused to the thorax. Muscles that move the coxae originate in the thorax.

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coxa (koks-ă) n. (pl. coxae)
1. the hip bone.

2. the hip joint. c. valga a deformity of the hip joint in which the angle between the neck and shaft of the femur is abnormally increased. c. vara a deformity of the hip joint in which the angle between the neck and shaft of the femur is abnormally decreased.

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coxa The first (basal) segment, attached to the thorax, of the leg of an insect, arachnid, or of certain other arthropods. See also femur; trochanter.

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coxa The uppermost joint of the leg of an insect.

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