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The Collaborative International Dictionary of English v.0.48 (gcide)

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] Hallstatt


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

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