noun
: a natural reservoir in which oil or gas may be confined because of changes in porosity and permeability of the strata rather than as a result of their structural attitudes
noun
: a natural reservoir in which oil or gas may be confined because of changes in porosity and permeability of the strata rather than as a result of their structural attitudes
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012