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semisulcus

[ sĕm′ē-sŭlkəs, sĕm′ī- ]
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n.
A slight groove on the edge of a bone or other structure that forms a complete sulcus when united with a similar groove on the corresponding adjoining structure.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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