Clay Clay (kl[=a]), n. [AS. cl[=ae]g; akin to LG. klei, D. klei, and perh. to AS. cl[=a]m clay, L. glus, gluten glue, Gr. gloio`s glutinous substance, E. glue. Cf. {Clog}.] 1. A soft earth, which is plastic, or may be molded with the hands, consisting of hydrous silicate of aluminium. It is the result of the wearing down and decomposition, in part, of rocks containing aluminous minerals, as granite. Lime, magnesia, oxide of iron, and other ingredients, are often present as impurities. [1913 Webster]

2. (Poetry & Script.) Earth in general, as representing the elementary particles of the human body; hence, the human body as formed from such particles. [1913 Webster]

I also am formed out of the clay. --Job xxxiii. 6. [1913 Webster]

The earth is covered thick with other clay, Which her own clay shall cover. --Byron. [1913 Webster]

{Bowlder clay}. See under {Bowlder}.

{Brick clay}, the common clay, containing some iron, and therefore turning red when burned.

{Clay cold}, cold as clay or earth; lifeless; inanimate.

{Clay ironstone}, an ore of iron consisting of the oxide or carbonate of iron mixed with clay or sand.

{Clay marl}, a whitish, smooth, chalky clay.

{Clay mill}, a mill for mixing and tempering clay; a pug mill.

{Clay pit}, a pit where clay is dug.

{Clay slate} (Min.), argillaceous schist; argillite.

{Fatty clays}, clays having a greasy feel; they are chemical compounds of water, silica, and aluminia, as {halloysite}, {bole}, etc.

{Fire clay}, a variety of clay, entirely free from lime, iron, or an alkali, and therefore infusible, and used for fire brick.

{Porcelain clay}, a very pure variety, formed directly from the decomposition of feldspar, and often called {kaolin}.

{Potter's clay}, a tolerably pure kind, free from iron. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • Halloysite — 7Å [1] Catégorie IX : silicates[2] …   Wikipédia en Français

  • Halloysite — is a 1:1 aluminosilicate clay mineral with the empirical formula Al2Si2O5(OH)4. Its main constituents are aluminium (20.90%), silicon (21.76%), and hydrogen (1.56%). Halloysite typically forms by hydrothermal alteration of alumino silicate… …   Wikipedia

  • halloysite — ● halloysite nom féminin (de O. d Halloy, nom propre) Silicate hydraté naturel d aluminium, proche du kaolin, appartenant au groupe des argiles. ⇒HALLOYSITE, subst. fém. MINÉR. Silicate naturel hydraté d aluminium, voisin du kaolin. L halloysite… …   Encyclopédie Universelle

  • Halloysite — Hal*loy site (h[a^]l*loi s[imac]t), n. [Named after Omalius d Halloy.] (Min.) A claylike mineral, occurring in soft, smooth, amorphous masses, of a whitish color. [1913 Webster] …   The Collaborative International Dictionary of English

  • halloysite — /heuh loy suyt, zuyt, ha /, n. a refractory clay mineral similar in composition to kaolinite. [1820 30; after Jean Baptiste Julien Omalius d Halloy (1783 1875), Belgian geologist; with site for ITE1, after mineral names formed from surnames… …   Universalium

  • halloysite — (entrée créée par le supplément) (a loi zi t ) s. f. Terme de minéralogie. Silicate alumineux …   Dictionnaire de la Langue Française d'Émile Littré

  • halloysite — hal·loy·site …   English syllables

  • halloysite — həˈlȯiˌsīt, haˈ , ˌzīt noun ( s) Etymology: French, from Omalius d Halloy died 1875 Belg. geologist + French ite : a clay mineral Al2Si2O5(OH)4.nH2O occurring in soft white or light colored masses and in at least two states of hydration …   Useful english dictionary

  • clay mineral — any of a group of hydrous aluminum silicate minerals, as kaolinite, illite, and montmorillonite, that constitute the major portion of most clays. [1945 50] * * * Any of a group of important hydrous aluminum silicates with a layered structure and… …   Universalium

  • Clay minerals — Oxford Clay (Jurassic) exposed near Weymouth, England. Clay minerals are hydrous aluminium phyllosilicates, sometimes with variable amounts of iron, magnesium, alkali metals, alkaline earths, and other cations. Clays have structures similar to… …   Wikipedia

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