raphide


raphide
n. [Gr. rhaphidos, needle]
(PORIFERA: Desmospongia)
A thin diactinal microsclere lacking ornamentation.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • raphide — [ rafid ] n. f. • 1846; gr. raphis, idos « aiguille » ♦ Biol. Cristal en forme d aiguilles qui se rencontre dans certaines cellules végétales ou animales. ● raphide nom masculin (du grec raphis, raphidos, aiguille) Faisceau de fines aiguilles… …   Encyclopédie Universelle

  • raphide — [rā′fid, raf′id] n. pl. raphides [raf′ə dēz΄, rā′fidz] 〚ModL < Gr rhaphis (gen. rhaphidos), needle: for IE base see RAPHE〛 Bot. a needle shaped crystal, usually of calcium oxalate, developed singly, or more often in bundles, in …   Universalium

  • raphide — [rā′fid, raf′id] n. pl. raphides [raf′ə dēz΄, rā′fidz] [ModL < Gr rhaphis (gen. rhaphidos), needle: for IE base see RAPHE] Bot. a needle shaped crystal, usually of calcium oxalate, developed singly, or more often in bundles, in a plant cell …   English World dictionary

  • raphide — noun (plural raphides) Etymology: French & New Latin; French raphide, from New Latin raphides, plural, from Greek rhaphides, plural of rhaphid , rhaphis needle, from rhaptein Date: circa 1842 any of the needle shaped crystals usually of calcium… …   New Collegiate Dictionary

  • raphide — noun A crystal of calcium oxalate, shaped like a needle, which forms as a metabolic byproduct in some plant cells. See Also: raphid, biraphid, monoraphid …   Wiktionary

  • raphide — (ra fi d ) s. f. Terme de botanique. Faisceau de cristaux en aiguilles qu on trouve dans les cellules de quelques végétaux, caryophyllées, orchidées, etc.    Il vaudrait mieux écrire rhaphide. ÉTYMOLOGIE    Du grec, aiguille à coudre …   Dictionnaire de la Langue Française d'Émile Littré

  • raphide — [ reɪfʌɪd] noun Botany a needle shaped crystal of calcium oxalate occurring in clusters within the tissues of certain plants. Origin C19: via Fr. from Gk rhaphis, rhaphid needle …   English new terms dictionary

  • raphide — ra·phide …   English syllables

  • raphide — n. a needle shaped crystal of an irritant substance such as oxalic acid formed in a plant. Etymology: back form. f. raphides pl. of raphis f. Gk rhaphis idos needle …   Useful english dictionary

  • Druse (botany) — Druse in onion scales (100x magnification) Druse are groups of crystals of calcium oxalate[1], silicates or carbonates present in plants. Calcium oxalate (Ca(COO)2, CaOx) crystals are found in algae, angiosperms and gymnosperms in a total of more …   Wikipedia


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