(ˌ)dī|nī.trō+ noun
Etymology: International Scientific Vocabulary dinitro- + phenol
: any of six isomeric crystalline compounds (NO 2 ) 2 C 6 H 3 OH formed by nitration of phenol or nitrophenols: as
a. : the yellowish isomer formed as an intermediate step in making picric acid and used chiefly as an intermediate (as for sulfur dyes and photographic developers) — called also 2,4-dinitrophenol
b. : a yellow commercial mixture usually of three of the isomers