[ nahy-truh-fee-nawl, -nol ]
/ ˌnaɪ trəˈfi nɔl, -nɒl /

noun Chemistry.

any compound derived from phenol by the replacement of one or more of its ring hydrogen atoms by the nitro group.
any of three water-soluble, crystalline isomers of such a derivative, having the formula C6H5NO3, occurring in yellow (ortho-nitrophenol), pale-yellow (meta-nitrophenol), and yellowish (para-nitrophenol) solids, used chiefly as intermediates in organic synthesis and as indicators.

Origin of nitrophenol

First recorded in 1850–55; nitro- + phenol Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019