“+ noun
Etymology: International Scientific Vocabulary nitr- + phenol
1. : a nitro derivative of phenol: as
a. : a yellow crystalline compound O 2 NC 6 H 4 OH used chiefly in organic synthesis — called also ortho-nitrophenol
b. : a colorless to yellowish isomeric compound O 2 NC 6 H 4 OH used chiefly as an acid-base indicator, as a fungicide, and in organic synthesis — called also para-nitrophenol
2. usually nitro phenol : a nitro derivative of any of the class of phenols