CLAY n.
g. -- 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.…
FATTY a.
Containing fat, or having the qualities of fat; greasy; gross; as, a fatty substance. Fatty acid (Chem.), any one of the paraffin series of monocarbonic acids, as formic acid, acetic, etc.; -- so called because the higher members, as stearic and palmitic acids, occur in the natural fats, and are themselves fatlike subs…
FIXED a.
ls (Chem.), non-volatile, oily substances, as stearine and olein, which leave a permanent greasy stain, and which can not be distilled unchanged; -- distinguished from volatile or essential oils. -- Fixed pivot (Mil.), the fixed point about which any line of troops wheels. -- Fixed stars (Astron.), such stars as alwa…
GREASE n.
An inflammation of a horse's heels, suspending the ordinary greasy secretion of the part, and producing dryness and scurfiness, followed by cracks, ulceration, and fungous excrescences. Grease bush. (Bot.) Same as Grease wood (below). -- Grease moth (Zoöl.), a pyralid moth (Aglossa pinguinalis) whose larva eats greasy…
LITHOGRAPHY n.
The art or process of putting designs or writing, with a greasy material, on stone, and of producing printed impressions therefrom. The process depends, in the main, upon the antipathy between grease and water, which prevents a printing ink containing oil from adhering to wetted parts of the stone not covered by the de…