Used to signify mild annoyance or disagreement.

A synthetic chemical used as a colorant in paints and dyes. First used in 1929. In pure form it is an intense blue. It is chlorinated to produce very intense dark green, and brominated and chlorinated copper phthalocyanines are mixed to produce a yellower emerald green.

A synthetic pigment (full name phthalocyanine). It is a bright, high intensity green used in oil- and acrylic-based artists' paints, and in other applications.

(organic chemistry) The acid anhydride of phthalic acid; manufactured by the oxidation of xylene or naphthalene, widely used in the synthesis of dyes, insecticides, plasticizers and pharmaceuticals.

(chemistry) of, relating to, or derived from naphthalene or phthalic acid

(organic chemistry) Any of three isomeric aromatic organic benzenedicarboxylic acids, C₆H₄(COOH)₂; especially the ortho- isomer manufactured from naphthalene, used in the synthesis of dyes, perfumes and other compounds.

(organic chemistry) Any salt or ester of a phthalic acid.

(archaic) An atrophy of the body or part of the body, especially pulmonary tuberculosis.

(organic chemistry) any of a range of lactones formed by the reaction of phenols with phthalic anhydride

plural of phthalein