- 1. (ek′strakt)A concentrated preparation of a drug obtained by removing the active constituents of the drug with suitable solvents, evaporating all or nearly all of the solvent, and adjusting the residual mass or powder to the prescribed standard. 2. (ek-strakt′)To remove part of a mixture with a solvent. 3. To perform extraction. [L. ex-traho, pp. -tractus, to draw out]- alcoholic e. a solid e. obtained by extracting the alcohol-soluble principles of a drug, followed by the evaporation of the alcohol.- allergenic e. e. (usually containing protein) from various sources, e.g., food, bacteria, pollen, and the like, suspected of specific action in stimulating manifestations of allergy; may be used for skin testing or desensitization. SYN: allergic e..- belladonna e. a powdered e. from the leaves and/or roots of Atropa belladonna; used to formulate various pharmaceutical dosage forms. Contains the alkaloids of belladonna (atropine and scopolamine) and has been used in the treatment of ulcers, diarrhea, and parkinsonism.- Büchner e. a cell-free e. of yeast, such as was prepared by Eduard and Hans Büchner and observed to catalyze alcoholic fermentation; this observation essentially eliminated “vitalism” as being responsible for biologic chemical reactions and initiated the beginnings of modern biochemistry (enzymology).- equivalent e. a fluidextract of the same strength, weight for weight, as the original drug. SYN: valoid.- hydroalcoholic e. a solid e. obtained by extracting the soluble principles of the drug with alcohol and water, followed by evaporation of the solution.- pollen e. liquid obtained by extracting the protein from the pollen of plants used for diagnostic testing or treatment.
* * *ex·tract ik-'strakt vt1) to pull or take out forcibly <\extracted a wisdom tooth>2) to withdraw (as the medicinally active components of a plant or animal tissue) by physical or chemical process also to treat with a solvent so as to remove a soluble substanceex·tract·able also ex·tract·ible ik-'strak-tə-bəl, 'ek-. adjex·tract 'ek-.strakt n something prepared by extracting esp a medicinally active pharmaceutical solution
* * *n.a preparation containing the pharmacologically active principles of a drug, made by evaporating a solution of the drug in water, alcohol, or ether.
* * *ex·tract (ekґstrakt) [L. extractum] a concentrated preparation of a vegetable or animal drug obtained by removing the active constituents therefrom with a suitable menstruum, evaporating all or nearly all the solvent, and adjusting the residual mass or powder to a prescribed standard. Extracts are prepared in three forms: semiliquid or of syrupy consistency, pilular or solid, and dry or powdered.
Medical dictionary. 2011.