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raphides

[raf-i-deez] /ˈræf ɪˌdiz/
plural noun, singular raphide [rey-fahyd] /ˈreɪ faɪd/ (Show IPA), raphis [rey-fis] /ˈreɪ fɪs/ (Show IPA). Botany
1.
acicular crystals, usually composed of calcium oxalate, that occur in bundles in the cells of many plants.
Origin
1835-1845
1835-45; < Neo-Latin < Greek rhaphídes, plural of rhaphís needle
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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raphides in Science
raphide
  (rā'fīd)   
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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