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2 definitions found for chiasm
| WordNet (r) 3.0 |
chiasm n 1: an intersection or crossing of two tracts in the form of the letter X [syn: chiasma, chiasm, decussation]
| Webster's Revised Unabridged Dictionary (1913) |
Chiasm Chi"asm, Chiasma Chi*as"ma, n. [NL. chiasma, fr. Gr. ? two lines placed crosswise, fr. ? to mark with a [chi].] (Anat.) A commissure; especially, the optic commissure, or crucial union of the optic nerves. -- Chi*as"mal, a..
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