The outer boundary, especially of a circular area. SYN: circumferentia [TA]. [L. circumferentia, a bearing around]
- articular c. of head of radius [TA] the portion of the head of the radius that articulates with the radial notch of the ulna. SYN: circumferentia articularis capitis radii [TA].
- articular c. of head of ulna [TA] the portion of the head of the ulna that articulates with the ulnar notch of the radius. SYN: circumferentia articularis capitis ulnae [TA].
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cir·cum·fer·ence (sər-kumґfər-əns) [circum- + L. ferre to bear] the outer limit or margin of a rounded body.Medical dictionary. 2011.