Extract (redirected from allergen extract)

extract

To decompress. In this context, extract means to "pull out" the original files from a compressed archive (ZIP file, RAR file, etc.). See archive, data compression and archive formats.

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extract

1. a preparation containing the active principle or concentrated essence of a material

2. Pharmacol a solution of plant or animal tissue containing the active principle

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extract [′ek‚strakt (noun)orik′strakt (verb)]

(chemistry)

Material separated from liquid or solid mixture by a solvent.

(computer science)

To form a new computer word by extracting and putting together selected segments of given words.

To remove from a computer register or memory all items that meet a specified condition.

(metallurgy)

To separate a metal or a mineral from an ore by various chemical or mechanical methods.

(pharmacology)

A pharmaceutical preparation obtained by dissolving the active constituents of a drug with a suitable menstruum, evaporating the solvent, and adjusting to prescribed standards.

A preparation, usually in a concentrated form, obtained by treating plant or animal tissue with a solvent to remove desired odiferous, flavorful, or nutritive components of the tissue.

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Extract 

a concentrated medicinal substance obtained from raw materials that contain certain active ingredients, such as glycosides, alkaloids, and vitamins; a type of galenical. Depending on the extracting agent used, extracts may be categorized as, for example, aqueous, alcoholic, or ethereal. Depending on the degree of thickening after evaporation, they may be classified as liquid, semiliquid (no more than 25 percent moisture), or dry (up to 5 percent moisture).