or phthalocyanin (ˌθæləʊˈsaɪəˌniːn, ˌθeɪ-, ˌfθæl-)
noun
1.
a cyclic blue-green organic pigment. Formula: (C6H4C2N)4N4H4
2.
any of a class of compounds derived by coordination of this compound with a metal atom. They are blue or green pigments used in printing inks, plastics, and enamels
Word origin
C20: from phthal- (see phthalein) + cyanine
phthalocyanine in American English
(ˌθæləˈsaɪəˌnin; ˌθæloʊˈsaɪənɪn; ˌ fθælˈsaɪəˌnin)
noun
1.
a blue-green organic compound, (C6H4C2N)4N4
2.
any of a group of brilliant, green or blue pigments that are metal, esp. copper, derivatives of this compound