say it: sahy-AN
cyan is a noun and adjective meaning "a primary subtractive color for light; has a blue-green color". It carries 2 recorded senses.
a primary subtractive color for light; has a blue-green color
of a bluish shade of green
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for cyan come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.