Also found in: Dictionary, Thesaurus, Encyclopedia.
a large flat bone formed by the fusion of the ilium, ischium, and pubis (in the adult), constituting the anterolateral portion of the pelvic girdle; it articulates with its fellow anteriorly at the pubic symphysis, with the sacrum posteriorly at the sacroiliac joint, and with the femur laterally at the hip joint.
Farlex Partner Medical Dictionary © Farlex 2012
2os(os) (os'a) plural.ossa [L. os, bone] Bone.
os coxaeInnominate bone.
The hooked bone on the ulnar side of the distal row of the carpus (wrist). Synonym: unciform bone
The horseshoe-shaped bone lying at the base of the tongue. Synonym: hyoid bone
The innominate (hip) bone.
The third bone in the second distal row of the carpus. Synonym: capitatum
The tiny bone in the ear that becomes attached to the incus, forming the lenticular process.
A bone occasionally found in the tendon of the peroneus longus muscle.
1. Flat bone; any bone that has only a slight thickness.
2. The orbital plate of the ethmoid bone.
The pubic bone; the anteroinferior part of the hip bone. In the adult, it and the ilium and ischium form the pelvic bone. The superior and inferior rami unite medially to form the pubic symphysis; at its lateral end the pubic bone forms approx. one fifth of the acetabulum.
os scaphoideumScaphoid bone.
os temporaleTemporal bone.
A bone of the foot that develops from an extra center of ossification along the posterior surface of the talus.
os unguisLacrimal bone.
A bone that develops from the ossification of the posterior tubercle of the fifth metatarsal.
Medical Dictionary, © 2009 Farlex and Partners