from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Unrefined petroleum.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Unrefined
oil; as it is found underground, consisting mainly of hydrocarbons
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a dark oil consisting mainly of hydrocarbons
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