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A skin disease characterized by the presence of numerous small pigmented spots resembling freckles, with which are subsequently mingled spots of atrophied skin.

A green or blue pigment produced by Peziza in certain kinds of decayed wood, as the beech, oak, birch, etc., and extracted as an amorphous powder resembling indigo.

der Dock. -- Yellow earth, a yellowish clay, colored by iron, sometimes used as a yellow pigment. -- Yellow fever (Med.), a malignant, contagious, febrile disease of warm climates, attended with jaundice, producing a yellow color of the skin, and with the black vomit. See Black vomit, in the Vocabulary. -- Yellow fl…

A frame worn on the neck of an animal, as a cow, a pig, a goose, to prevent passage through a fence.

A pigment obtained, usually by roasting cobalt glance with sand or quartz, as a dark earthy powder. It consists of crude cobalt oxide, or of an impure cobalt arseniate. It is used in porcelain painting, and in enameling pottery, to produce a blue color, and is often confounded with smalt, from which, however, it is dis…

yl, which takes fire spontaneously on exposure to the atmosphere. -- Zinc green, a green pigment consisting of zinc and cobalt oxides; -- called also Rinmann's green. -- Zinc methyl (Chem.), a colorless mobile liquid Zn(CH3)2, produced by the action of methyl iodide on a zinc sodium alloy. It has a disagreeable odor,…

A pigment giving the black color to the feathers of many birds.

The wood pigeon. [Prov. Eng.]