diphenylketone
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diphenylketone — di·phen·yl·ke·tone (dī fĕn əl kēʹtōn, fē nəl ) n. See benzophenone. * * * … Universalium
benzophenone — noun a) Any of a class of aromatic ketones based on the parent compound diphenylketone (CH)CO; used, amongst other things, as ingredients in sunblock. b) The compound diphenylmethanone … Wiktionary