The Collaborative International Dictionary of English v.0.48:

Extract \Ex*tract"\, v. t. [imp. & p. p. Extracted; p. pr. &
   vb. n. Extracting.] [L. extractus, p. p. of extrahere to
   extract; ex out + trahere to draw. See Trace, and cf.
   Estreat.]
   1. To draw out or forth; to pull out; to remove forcibly from
      a fixed position, as by traction or suction, etc.; as, to
      extract a tooth from its socket, a stump from the earth, a
      splinter from the finger.
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            The bee
            Sits on the bloom extracting liquid sweet. --Milton.
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   2. To withdraw by expression, distillation, or other
      mechanical or chemical process; as, to extract an essence.
      Cf. Abstract, v. t., 6.
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            Sunbeams may be extracted from cucumbers, but the
            process is tedious.
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   3. To take by selection; to choose out; to cite or quote, as
      a passage from a book.
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            I have extracted out of that pamphlet a few
            notorious falsehoods.                 --Swift.
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   To extract the root (Math.), to ascertain the root of a
      number or quantity.
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