1. Descent; lineage; birth; derivation of persons from a stock or family. Hence,the stock or family from which one has descended. We say, a man is of a noble extraction.
2. In pharmacy, the operation of drawing essences, tinctures, _c. from a substance.
3. In arithmetic and algebra, the extraction of roots is the operation of finding the root of a given number of quantity; also, the method or rule by which the operation is performed.