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medullary ray

noun, Botany
1.
(in the stems of woody plants) one of the vertical bands or plates of unspecialized tissue that radiate between the pith and the bark.
Also called pith ray.
Origin
1820-1830
1820-30
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for medullary-ray

medullary ray

noun
1.
any of the sheets of conducting tissue that run radially through the vascular tissue of some higher plants
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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medullary-ray in Medicine

medullary ray n.
The center of the renal, cortical lobule, consisting of the ascending or descending limbs of the nephronic loop or of the collecting tubules. Also called Ferrein's pyramid.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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