Allotropism Al*lot"ro*pism, Allotropy Al*lot"ro*py, n. [Gr. ? other + direction, way, ? to turn: cf. F. allotropie.] (Chem.) The property of existing in two or more conditions which are distinct in their physical or chemical relations. [1913 Webster]

Note: Thus, carbon occurs crystallized in octahedrons and other related forms, in a state of extreme hardness, in the diamond; it occurs in hexagonal forms, and of little hardness, in black lead; and again occurs in a third form, with entire softness, in lampblack and charcoal. In some cases, one of these is peculiarly an active state, and the other a passive one. Thus, ozone is an active state of oxygen, and is distinct from ordinary oxygen, which is the element in its passive state. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • Allotropy — (Gr. allos , other, and tropos , manner) is a behavior exhibited by certain chemical elements: these elements can exist in two or more different forms, known as allotropes of that element. In each different allotrope, the element s atoms are… …   Wikipedia

  • allotropy — allotropy. См. аллотропия. (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.

  • Allotropy — Allotropy. См. Аллотропия. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • allotropy — [ə lä′trə pē] n. [< Gr allotropos, of or in another manner < allos, other + tropos, way, turn: see TROPE] the property that certain chemical elements and compounds have of existing in two or more different forms, as carbon in the form of… …   English World dictionary

  • allotropy — /euh lo treuh pee/, n. Chem. a property of certain elements, as carbon, sulfur, and phosphorus, of existing in two or more distinct forms; allomorphism. Also, allotropism. [1840 50; ALLO + TROPY] * * * ▪ chemistry       the existence of a… …   Universalium

  • allotropy — the property possessed by certain elements to exist in two or more distinct forms that are chemically identical but have different physical properties. In the case of iron the crystal structure has one form at room temperature and another at high …   Mechanics glossary

  • allotropy — alotropija statusas T sritis chemija apibrėžtis Elemento gebėjimas sudaryti kelias vienines medžiagas. atitikmenys: angl. allotropy rus. аллотропия …   Chemijos terminų aiškinamasis žodynas

  • allotropy — alotropija statusas T sritis fizika atitikmenys: angl. allotropy vok. Allotropie, f rus. аллотропия, f pranc. allotropie, f; énantiotropie, f …   Fizikos terminų žodynas

  • allotropy — allotrope ► NOUN Chemistry ▪ each of two or more different physical forms in which an element can exist (e.g. graphite, charcoal, and diamond as forms of carbon). DERIVATIVES allotropic adjective allotropy noun. ORIGIN from Greek allotropos of… …   English terms dictionary

  • allotropy — noun (plural pies) Date: 1850 the existence of a substance and especially an element in two or more different forms (as of crystals) usually in the same phase • allotropic adjective …   New Collegiate Dictionary