subtilization

from The Collaborative International Dictionary of English v.0.48

Subtilization \Sub`til*i*za"tion\, n. [Cf. F. subtilization.]
   1. The act of making subtile.
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   2. (Old Chem.) The operation of making so volatile as to rise
      in steam or vapor.
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   3. Refinement; subtlety; extreme attenuation.
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