FUNDAMENTAL a.
sis; serving for the foundation. Hence: Essential, as an element, principle, or law; important; original; elementary; as, a fundamental truth; a fundamental axiom. The fundamental reasons of this war. Shak. Some fundamental antithesis in nature. Whewell. Fundamental bass (Mus.), the root note of a chord; a bass formed…
GAS n.
A complex mixture of gases, of which the most important constituents are marsh gas, olefiant gas, and hydrogen, artificially produced by the destructive distillation of gas coal, or sometimes of peat, wood, oil, resin, etc. It gives a brilliant light when burned, and is the common gas used for illuminating purposes.…