from The American Heritage® Dictionary of the English Language, 4th Edition
- n. One of a bundle of needlelike crystals of calcium oxalate occurring in many plant cells.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A crystal of calcium oxalate, shaped like a needle, which forms as a metabolic byproduct in some plant cells.
French, sing. of raphides, from New Latin, from Greek rhaphides, pl. of rhaphis, needle, from rhaptein, to sew.(American Heritage® Dictionary of the English Language, Fourth Edition)
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