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An opaque, impure variety of quartz, of red, yellow, and other dull colors, breaking with a smooth surface. It admits of a high polish, and is used for vases, seals, snuff boxes, etc. When the colors are in stripes or bands, it is called striped or banded jasper. The Egyptian pebble is a brownish yellow jasper. Jasper…

oving a cataract by thrusting a needle through the cornea of the eye, and breaking up the opaque mass.

It is a hydrous silicate of alumina and lime. Exposed to the air, it loses water, becomes opaque, and crumbles. [Written also laumonite.]

usually found in granitic rocks in small six-sided tables, or as an aggregation of minute opaque scales. See Mica.

A nearly opaque white mineral, in part identical with titanite, observed in some igneous rocks as the result of the alteration of titanic iron.

metallic mirror attached to the object-glass end of a microscope, to throw down light on opaque objects; a reflector.

A kind of pottery, with opaque glazing and showy, which reached its greatest perfection in Italy in the 16th century.

A modification of the magic lantern, used esp. for throwing a magnified image of an opaque object on a screen, solar or artificial light being used.

allic element mostly obtained by reduction from cinnabar, one of its ores. It is a heavy, opaque, glistening liquid (commonly called quicksilver), and is used in barometers, thermometers, ect. Specific gravity 13.6. Symbol Hg (Hydrargyrum). Atomic weight 199.8. Mercury has a molecule which consists of only one atom. It…

ss or other material, in which the light portions of the original are represented in some opaque material (usually reduced silver), and the dark portions by the uncovered and transparent or semitransparent ground of the picture.

A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.

The state of being opaque; the quality of a body which renders it impervious to the rays of light; want of transparency; opaqueness.

Opaque. [R.] Milton. -- O*pa"cous*ness, n. [R.]

Opaque. [Obs.] Sterne.

See Opaque.

ience which treats of the nature and properties of light, the laws of its modification by opaque and transparent bodies, and the phenomena of vision.

Transparent; clear; limpid; translucent; not opaque. "Pellucid crystal." Dr. H. More. "Pellucid streams." Wordsworth.

Capable of being through; transparent; translucent; not opaque. [Obs.] Peacham.

lantern. The figures are painted in transparent colors, and all the rest of the glass is opaque black. The screen is between the spectators and the instrument, and the figures are often made to appear as in motion, or to merge into one another.

A style of painting, popular in England in the 19th century, in which a thick opaque color is applied without background and with scarcely any shading, to thin paper, producing flowers, birds, etc., in imitation of Oriental work. Hence: Poonah brush, paper, painter, etc.