- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for raphides
The microscope showed it to be free from oxalate of lime or other raphides.The Fijians
Some of these cells contain bundles of raphides (Fig. 2), one of which bundles is shown crushed in Fig.
The fuchsia and tradescantia contained bundles of raphides of the same form and equally as fine as those of the acrid plants.
The filtered ether was clear, entirely free from raphides, and had also lost every trace of its acridity.
Under the microscope the raphides seemed as plentiful as in the case of the two acrid plants.
- 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.
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