ˈklāvəz-, ˈklēvz- noun
Usage: usually capitalized C
Etymology: after P.T. Cleve — more at cleveite
: either of two colorless crystalline isomeric monosulfonic acids NH 2 C 10 H 6 SO 3 H derived from alpha-naphthylamine and used as intermediates in making azo dyes ; also : a mixture of these acids