rachilla
American Heritage Dictionary:
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ra·chil·la
(rə-kĭl'ə) 
n., pl., -chil·lae (-kĭl'ē).
A diminutive axis of a spikelet that bears the florets, as in grasses and sedges.
n., pl., -chil·lae (-kĭl'ē).
A diminutive axis of a spikelet that bears the florets, as in grasses and sedges.
[New Latin, diminutive of RACHIS .]
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American Heritage Dictionary
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
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