D defs.my
Entry 3 senses Webster, 1913

Subtilization

· Sub·til·i·za·tion · IPA
01 n. The act of making subtile.
  1. 1.
    The act of making subtile.
  2. 2.
    The operation of making so volatile as to rise in steam or vapor.(Old Chem.)
  3. 3.
    Refinement; subtlety; extreme attenuation.