Also found in: Dictionary, Encyclopedia, Wikipedia.
n. pl. raphides (răf′ĭ-dēz′) or raphises
One of a bundle of needlelike crystals of calcium oxalate occurring in many plant cells.
raphidea calcium oxalate crystal present in bundles in some plant cells.
needle-like microscopic crystals of calcium oxalate found in plants (Dieffenbachia, Philodendron, Zantedescgia, Colocasia, Alocasia spp.); reputedly capable of causing painful laceration of the tongue.