'Semilunar bone' definitions:
Definition of 'semilunar bone'
(from WordNet)
noun
One of the eight small wrist bones [syn: lunate bone, semilunar bone, os lunatum]
Definition of 'Semilunar bone'
From: GCIDE
- Semilunar \Sem`i*lu"nar\, a. Shaped like a half moon. [1913 Webster]
- Semilunar bone (Anat.), a bone of the carpus; the lunar. See Lunar, n.
- Semilunar valves, or Sigmoid valves (Anat.), the valves at the beginning of the aorta and of the pulmonary artery which prevent the blood from flowing back into the ventricle. [1913 Webster]