rachides

rachis

[rey-kis]
noun, plural rachises, rachides [rak-i-deez, rey-ki-] .
1.
Botany.
a.
the axis of an inflorescence when somewhat elongated, as in a raceme.
b.
(in a pinnately compound leaf or frond) the prolongation of the petiole along which the leaflets are disposed.
c.
any of various axial structures.
2.
Ornithology. the part of the shaft of a feather bearing the web. See illus. under feather.
3.
Anatomy, spinal column.
Also, rhachis.


Origin:
1775–85; < Neo-Latin < Greek rháchis spine, ridge, backbone

rachidian [ruh-kid-ee-uhn] , rachial [rey-kee-uhl] , rachidial, adjective
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Collins
World English Dictionary
rachis or rhachis (ˈreɪkɪs)
 
n , pl rachises, rhachises, rachides, rhachides
1.  botany the main axis or stem of an inflorescence or compound leaf
2.  ornithol the shaft of a feather, esp the part that carries the barbs
3.  another name for spinal column
 
[C17: via New Latin from Greek rhakhis ridge]
 
rhachis or rhachis (ˈreɪkɪs, ˈrækɪˌdiːz, ˈreɪ-)
 
n
 
[C17: via New Latin from Greek rhakhis ridge]
 
rachial or rhachis
 
adj
 
rhachial or rhachis
 
adj
 
rachidial or rhachis
 
adj
 
rhachidial or rhachis
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

rachis ra·chis (rā'kĭs)
n. pl. ra·chis·es or rach·i·des (rāk'ĭ-dēz', rā'kĭ-)
See spinal column.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
rachis   (rā'kĭs)  Pronunciation Key 
Plural rachises or rachides (rāk'ĭ-dēz', rā'kĭ-)
A main axis or shaft, such as the main stem of an inflorescence, the stalk of a pinnately compound leaf, the shaft of a feather, or the spinal column.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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