plural of ramus.
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noun, plural rami [rey-mahy] . Botany, Zoology, Anatomy.
a branch, as of a plant, vein, bone, etc.

1795–1805; < Latin rāmus branch, twig, bough; akin to rādīx root1 (see radix)

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World English Dictionary
rami (ˈreɪmaɪ)
the plural of ramus

ramus (ˈreɪməs)
n , pl -mi
1.  the barb of a bird's feather
2.  either of the two parts of the lower jaw of a vertebrate
3.  any part or organ that branches from another part
[C19: from Latin: branch]

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American Heritage
Medical Dictionary

ramus ra·mus (rā'məs)
n. pl. ra·mi (-mī')

  1. Any of the primary divisions of a nerve or blood vessel.

  2. A part of an irregularly shaped bone that is thicker than a process and forms an angle with the main body, especially the ascending part of the lower jaw that makes a joint at the temple.

  3. Any of the primary divisions of a cerebral sulcus.

The American Heritage® Stedman's Medical Dictionary
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