Naphtha /(năf"thȧ [or] năp"thȧ)/

Naph·tha

Naphtha

n.
  1. The complex mixture of volatile, liquid, inflammable hydrocarbons, occurring naturally, and usually called crude petroleum, mineral oil, or rock oil. (Chem.)
  2. One of several volatile inflammable liquids obtained by the distillation of certain carbonaceous materials and resembling the naphtha from petroleum; as, Boghead naphtha, from Boghead coal (obtained at Boghead, Scotland); crude naphtha, or light oil, from coal tar; wood naphtha, from wood, etc. (Chem.)

Phrases & Compounds
Naphtha vitrioli
common ethyl ether; -- formerly called sulphuric ether. See Ether.