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[raf-i-deez] /ˈræf ɪˌdiz/
plural noun, singular raphide [rey-fahyd] /ˈreɪ faɪd/ (Show IPA), raphis [rey-fis] /ˈreɪ fɪs/ (Show IPA). Botany
acicular crystals, usually composed of calcium oxalate, that occur in bundles in the cells of many plants.
Origin of raphides
1835-45; < New Latin < Greek rhaphídes, plural of rhaphís needle Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for raphide


noun (pl) raphides (ˈræfɪˌdiːz)
any of numerous needle-shaped crystals, usually of calcium oxalate, that occur in many plant cells as a metabolic product
Word Origin
C18: from French, from Greek rhaphis needle
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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raphide in Science
Plural raphides (rāf'ĭ-dēz')
One of a bundle of needlelike crystals of calcium oxalate occurring in many plant cells. The crystals discourage animals from eating the plant by irritating their tissues.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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