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.
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.
2. (Poetry & Script.) Earth in general, as representing the elementary particles of the human body; hence, the human body as formed from such particles.
I also am formed out of the clay. --Job xxxiii. 6.
The earth is covered thick with other clay, Which her own clay shall cover. --Byron.
{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.