Heavy

(of wine), the product obtained when alcohol is treated with an exce of sulphuric acid. See Oleum cethereum. O., Mineral, petroleum and certain of its derivatives. O. of Neroli, an e ential oil from the flowers of bitter orange, used as a perfume. O., Rock-, petroleum. O., Straits-, the first oil obtained by the exposure of the livers of cod-fish to the sun in casks, on board the ships. O., Sweet. See Olive. O., Volatile, O., E ential, one which is volatile at ordinary temperatures. Volatile oils are odoriferous, and are generally obtained by distillation. ch535.xhtml o 456