“+ noun
Etymology: International Scientific Vocabulary triphenyl- + methyl
: the univalent radical C(C 6 H 5 ) 3 derived from triphenylmethane by removal of the nonaromatic hydrogen atom and isolated as the first organic free radical in the form of very active yellow solutions by treating triphenylmethyl chloride C(C 6 H 5 ) 3 Cl in solution usually with finely divided silver or zinc — compare triphenylcarbinol