The Collaborative International Dictionary of English v.0.48:

Oxybenzene \Ox`y*ben"zene\, n. [Oxy
   (b) + benzene.] (Chem.) Hydroxy benzene. Same as Phenol.
       [1913 Webster]

WordNet (r) 3.0 (2006):

oxybenzene
    n 1: a toxic white soluble crystalline acidic derivative of
         benzene; used in manufacturing and as a disinfectant and
         antiseptic; poisonous if taken internally [syn: carbolic
         acid, phenol, hydroxybenzene, oxybenzene, phenylic
         acid]