Search Result for "petroleum": 
Wordnet 3.0

NOUN (1)

1. a dark oil consisting mainly of hydrocarbons;
[syn: petroleum, crude oil, crude, rock oil, fossil oil, oil]

The Collaborative International Dictionary of English v.0.48:

Petroleum \Pe*tro"le*um\ (p[-e]*tr[=o]"l[-e]*[u^]m), n. [NL., fr. L. petra a rock + oleum oil: cf. F. p['e]trole. Cf. Petrify, and Oil.] Rock oil, mineral oil, or natural oil, a dark brown or greenish inflammable liquid, which, at certain points, exists in the upper strata of the earth, from whence it is pumped, or forced by pressure of the gas attending it. It consists of a complex mixture of various hydrocarbons, largely of the methane series, but may vary much in appearance, composition, and properties. It is refined by distillation, and the products include kerosene, benzine, gasoline, paraffin, etc. [1913 Webster] Petroleum spirit, a volatile liquid obtained in the distillation of crude petroleum at a temperature of 170[deg] Fahr., or below. The term is rather loosely applied to a considerable range of products, including benzine and ligroin. The terms petroleum ether, and naphtha, are sometimes applied to the still more volatile products, including rhigolene, gasoline, cymogene, etc. [1913 Webster] Petroleur
WordNet (r) 3.0 (2006):

petroleum n 1: a dark oil consisting mainly of hydrocarbons [syn: petroleum, crude oil, crude, rock oil, fossil oil, oil]
Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "petroleum": avgas, benzine, coal oil, crude, crude oil, electricity, ethyl, ethyl gas, fossil oil, gas, gasoline, high-octane gas, high-test, illuminant, illuminating gas, kerosene, lead-free gas, light source, low-lead gas, luminant, motor oil, oil, paraffin, petrol, premium gas, regular, rock oil
U.S. Gazetteer Counties (2000):

Petroleum -- U.S. County in Montana Population (2000): 493 Housing Units (2000): 292 Land area (2000): 1653.903684 sq. miles (4283.590695 sq. km) Water area (2000): 20.110830 sq. miles (52.086808 sq. km) Total area (2000): 1674.014514 sq. miles (4335.677503 sq. km) Located within: Montana (MT), FIPS 30 Location: 47.000478 N, 108.290051 W Headwords: Petroleum Petroleum, MT Petroleum County Petroleum County, MT