Share this entry

raphide Syllabification: ra·phide
Pronunciation: /ˈrāfīd/

Definition of raphide in English:


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'.

Definition of raphide in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove ads and access premium resources

Word of the day confidant
Pronunciation: ˈkänfəˌdant
a person with whom one shares a secret...