Definition of raphide in English:

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Pronunciation: /ˈrāfīd/


A needle-shaped crystal of calcium oxalate occurring in clusters within the tissues of certain plants.
Example sentences
  • Occasionally, calcium oxalate raphide or druse crystals were observed in this tissue.
  • The callus consists largely of parenchyma with raphides and is supplied by eight to ten collateral bundles.
  • In monocots, calcium oxalate is most often laid down and usually as bundles of needle-shaped crystals known as raphides.


Mid 19th century: via French from Greek rhaphis, rhaphid- 'needle'.

For editors and proofreaders

Syllabification: ra·phide

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