diaspore

diaspore
/duy"euh spawr', -spohr'/, n.
1. a mineral, aluminum oxyhydroxide, AlO(OH), occurring in crystals, or more usually in lamellar or scaly masses: a principal constituent of bauxite and an important source of aluminum.
2. Bot. a disseminule, esp. one that undergoes dispersal.
[1795-1805; < Gk diasporá; see DIASPORA]

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      white or grayish, hard, glassy aluminum oxide mineral (HAlO2) that is associated with corundum in emery and is widespread in laterite, bauxite, and aluminous clays. It is abundant in Hungary, South Africa, France, Arkansas, and Missouri. Diaspore is dimorphous with boehmite (i.e., it has the same chemical composition but different crystal structure); it does not contain a hydroxyl group (OH) but has cationic hydrogen (H+) in twofold coordination with the oxygen atoms. For detailed physical properties, see oxide mineral (table).

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Universalium. 2010.

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  • diaspore — ● diaspore nom féminin (grec diaspora, dispersion) Partie d un végétal (graine, fruit, etc.) qui se détache du pied mère pour reproduire l espèce après dissémination. (Chez les cryptogames à générations alternées, la spore est aussi considérée… …   Encyclopédie Universelle

  • Diaspore — Di a*spore, n. [From Gr. ? a scattering; dia through, asunder + ? to sow, scatter like seed: cf. F. diaspore.] (Min.) A hydrate of alumina, often occurring in white lamellar masses with brilliant pearly luster; so named on account of its… …   The Collaborative International Dictionary of English

  • Diaspore — ist der botanische Sammelbegriff für alle verbreitungsfördernden Einheiten wie Samen, Teilfrüchte, Früchte, Fruchtstände, Sporen, Bulbillen oder sonstige vegetative Brutknospen, die der Ausbreitung von Pflanzen oder Pilzen dienen. Der im… …   Deutsch Wikipedia

  • diaspore — diaspore. См. диаспора. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Diaspore — Diaspore, funktionelle Ausbreitungseinheit von Pflanzen, d.h. Teile wie Spore, Samen, Teilfrucht, Frucht oder auch ganzer Fruchtstand, aus denen neue Pflanzen hervorgehen können …   Deutsch wörterbuch der biologie

  • diaspore — [dī′ə spôr΄] n. [< Gr diaspora: see DIASPORA] a native hydrate of aluminum, Al2O3·H2O, which crackles and disperses when heated …   English World dictionary

  • Diaspore — Not to be confused with Diaspore (botany) or Diaspora. Diaspore Diaspore from Slovakia General Category Oxide min …   Wikipedia

  • Diaspore — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. En botanique le terme diaspore désigne tout élément permettant d accomplir la dissémination d une espèce végétale (par reproduction ou par multiplication… …   Wikipédia en Français

  • Diaspore — diaspora statusas T sritis ekologija ir aplinkotyra apibrėžtis Galinti plisti augalo dalis (spora, sėkla, svogūnėlis, gniužulo dalis), iš kurios gali išaugti naujas augalas. atitikmenys: angl. diaspore vok. Diaspore, f; Verbreitungseinheit, f rus …   Ekologijos terminų aiškinamasis žodynas

  • diaspore — diaspora statusas T sritis ekologija ir aplinkotyra apibrėžtis Galinti plisti augalo dalis (spora, sėkla, svogūnėlis, gniužulo dalis), iš kurios gali išaugti naujas augalas. atitikmenys: angl. diaspore vok. Diaspore, f; Verbreitungseinheit, f rus …   Ekologijos terminų aiškinamasis žodynas

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