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fissura

[ fĭ-surə, -shurə ]
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n. pl. fis•su•rae (-surē, -shurē)
A deep fissure, cleft, or slit.
A particularly deep sulcus of the surface of the brain or spinal cord.
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IS and ARE are both forms of which verb?
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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