raphide

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raphide

(rā′fīd) also

raphis

(-fĭs)
n. pl. raphides (răf′ĭ-dēz′) or raphises
One of a bundle of needlelike crystals of calcium oxalate occurring in many plant cells.

raphide

a calcium oxalate crystal present in bundles in some plant cells.

raphide

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.
References in periodicals archive ?
Systematic significance of cell inclusions in Haemodoraceae and allied families: silica bodies and tapetal raphides.
Idioblasts with raphides in the storage parenchyma and chlorenchyma.
Crystalline inclusions in leaf tissue: (0) absent; (1) sandy; (2) druses; (3) raphides, as well as other forms; (4) framboids.
Raphides are long needle-shaped rods of calcium oxalate and were sometimes found in conjunction with other plant residues (Fahn 1982; Pearsall 2000).
For members of the Rubioideae, the presence of raphides is characteristic, but the other two subfamilies are mainly supported by molecular data.