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from, chromium; -- said of the compounds of chromium in which it has its higher valence. Chromic acid, an acid, H2CrO4, analogous to sulphuric acid, not readily obtained in the free state, but forming well known salts, many of which are colored pigments, as chrome yellow, chrome red, etc. -- Chromic anhydride, a bril…

Free from color; colorless; as, in Physiol. Chem., the achromic point of a starch solution acted upon by an amylolytic enzyme is the point at which it fails to give any color with iodine.

Furnishing or giving two colors; -- said of defective vision, in which all the compound colors are resolvable into two elements instead of three. Sir J. Herschel.

Pertaining to, or produced by, heliochromy.

The art of printing colored pictures on canvas from oil paintings on stone.

Made, or done, with a single color; as, a monochromic picture.

Pertaining to, or designating, a certain one of the highly oxidized compounds of chromium, which has a deep blue color, and is produced by the action of hydrogen peroxide.

Of or pertaining to photochromy; produced by photochromy.

Polychromatic.

Pertaining to the art of stereochromy; produced by stereochromy. -- Ste`re*o*chro"mic*al*ly, adv.

If, pertaining to, or consisting of, three colors or color sensations.

A salt containing two parts of chromic acid to one of the other ingredients; as, potassium bichromate; -- called also dichromate.

(amalgamated) is surrounded by dilute sulphuric acid, and the carbon by nitric acid or a chromic acid mixture, the two plates being separated by a porous cup.

A salt of chromic acid.

A black submetallic mineral consisting of oxide of chromium and iron; -- called also chromic iron.

taining to, or derived from, chromium, when this element has a valence lower than that in chromic compounds. Chromous acid, a bluish gray powder, CrO.OH, of weak acid properties and regard as an acid.

A salt of chromic acid containing two equivalents of the acid radical to one of the base; -- called also bichromate.

See Lithochromics.

stalline substance, C10H6O2, analogous to quinone, obtained by oxidizing naphthalene with chromic acid.

A salt of a polychromic acid.