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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. 2018.
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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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