Wiktionary
diphenyl ether
n. (lb en organic compound) The aromatic ether (C6H5)2O
Wikipedia
Diphenyl ether
Diphenyl ether is the organic compound with the formula O( C H). The molecule is subject to reactions typical of other phenyl rings, including hydroxylation, nitration, halogenation, sulfonation, and Friedel–Crafts alkylation or acylation. This simple diaryl ether enjoys a variety of niche applications.