| Cyanin | n. [ See Cyanic. ] (Chem.) The blue coloring matter of flowers; -- called also |
| Cyanine | n. (Chem.) One of a series of artificial blue or red dyes obtained from quinoline and lepidine and used in calico printing. [ 1913 Webster ] |
| cyanine dye | (n) any of a class of dyes containing a -CH= group linking two heterocyclic rings containing nitrogen; used as sensitizers in photography |