cyanic colors

From The Collaborative International Dictionary of English v.0.48:

Cyanic \Cy*an"ic\ (s?-?n"?k), a. [Gr. ky`anos a dark blue
   substance: cf. F. cyanique. Cf. Kyanite.]
   1. Pertaining to, or containing, cyanogen.
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   2. Of or pertaining to a blue color.
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   Cyanic acid (Chem.), an acid, HOCN, derived from
      cyanogen, well known in its salts, but never isolated in
      the free state.

   Cyanic colors (Bot.), those colors (of flowers) having some
      tinge of blue; -- opposed to xanthic colors. A color of
      either series may pass into red or white, but not into the
      opposing color. Red and pure white are more common among
      flowers of cyanic tendency than in those of the other
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