perlite
Look at other dictionaries:
Perlite — is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently.Properties and usesWhen it… … Wikipedia
perlite — [ pɛrlit ] n. f. • 1812; de perle 1 ♦ Minér. Silicate naturel, pauvre en eau, de la famille des feldspaths. 2 ♦ (v. 1960) Techn. Constituant microscopique des alliages ferreux. Fonte à perlite. ● perlite nom féminin (de perle) Rhyolite vitreuse… … Encyclopédie Universelle
Perlite — Per lite, n. (Min.) Same as {Pearlite}. [1913 Webster] … The Collaborative International Dictionary of English
perlite — [pʉr′līt΄] n. [Fr < perle,PEARL1] 1. Geol. a greenish volcanic glass, similar to obsidian, with a pearly luster and multiple, minute concentric cracks, used as insulation and in making concrete, plaster, etc. 2. PEARLITE perlitic [pər lit′ik]… … English World dictionary
perlite — perlitic /perr lit ik/, adj. /perr luyt/, n. Petrog. a volcanic glass in which concentric fractures impart a distinctive structure resembling masses of small spheroids, used as a plant growth medium. Also, pearlite. [1825 35; < F; see PEARL1,… … Universalium
Perlite — Perlit (vulkanisches Glas) mit weißem, pudrigen Aussehen Perlit (englisch: perlite) bezeichnet in den Geowissenschaften ein alteriertes (chemisch und physikalisch umgewandeltes) vulkanisches Glas (Obsidian) und zählt damit zu den Gesteinen. Die… … Deutsch Wikipedia
Perlite — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. La perlite est un constituant biphasé de l acier. La perlite est une roche naturelle à base de silice. Catégorie : Homonymie … Wikipédia en Français
perlite — per·lì·te s.f. 1. TS petr. roccia effusiva acida costituita principalmente da vetro disposto in concrezioni simili a perle che si formano durante il raffreddamento, utilizzata come isolante termoacustico 2. TS metall. eutettico di ferrite e… … Dizionario italiano
perlite — GLOSSARY OF VOLCANIC TERMS Hydrated obsidian, generally light grey in color, that is commonly characterized by rounded, onion skin like fractures (perlitic cracks). Apache s tears are unhydrated clumps of fresh obsidian that are commonly found… … Glossary of volcanic terms
perlite — n. volcanic glass forming, when expanded by heat, an insulating material and a light weight aggregate added to concrete and plaster or used as soil conditioner. ♦ perlitic, a. having perlite like texture … Dictionary of difficult words
perlite — perlitas statusas T sritis chemija apibrėžtis Kaitinant išpūsti, 5–20 kartų padidėję rūgščiosios vulkaninės uolienos grūdeliai atitikmenys: angl. pearlite; perlite rus. перлит … Chemijos terminų aiškinamasis žodynas
