rock-oil
[rock n.1]
Native naphtha.
1668 Charleton Onomast. 236 Rock oil, or Petroleum. 1802–3 tr. Pallas's Trav. (1812) II. 282 In the same country are springs, having inspissated rock-oil on their surface. 1839 Ure Dict. Arts 879 Rock-oil is very inflammable. 1856 Orr's Circle Sci., Pract. Chem. 482 An oil matter called rock-oil oozes out of the ground. |