Pronunciation: ˌ tha-l ō - ' s ī - ə - ˌ n ē n, ˌ th ā -
Function: noun
Etymology: International Scientific Vocabulary phthal ic acid + -o- + cyanine
Date: 1933
: a bright greenish-blue crystalline compound C 32 H 18 N 8 also : any of several metal derivatives that are brilliant fast blue to green dyes or pigments