hydrocarbon

n. compound composed of carbon and hydrogen (Chemistry)

In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. With relation to chemical terminology,  aromatic hydrocarbons or arenes, alkanes, alkenes and alkyne-based compounds composed entirely of carbon or hydrogen are referred to as "Pure" hydrocarbons, whereas other hydrocarbons with bonded compounds or impurities of sulphur or nitrogen, are referred to as "impure", and remain somewhat erroneously referred to as hydrocarbons.
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Hydrocarbon /hy·dro·car·bon/ an organic compound that contains carbon and hydrogen only. alicyclic hydrocarbon one that has cyclic structure and [more]Hydrocarbon - Community and Resources

Noun
1. an organic compound containing only carbon and hydrogen
(hypernym) organic compound
(hyponym) chlorobenzene

(n.)
A compound containing only hydrogen and carbon, as methane, benzene, etc.; also, by extension, any of their derivatives.