Definition of raphide in English:


Line breaks: raph|ide
Pronunciation: /ˈreɪfʌɪd


  • A needle-shaped crystal of calcium oxalate occurring in clusters within the tissues of certain plants.
    More 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'.

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used to address an English nobleman