chemical compound

A chemical compound is a substance consisting of two or more elements chemically-bonded together in a fixed proportion by mass.
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A distinct and pure substance formed by the union or two or more elements in definite proportion by weight.

Noun
1. (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
(synonym) compound
(hypernym) substance, matter
(hyponym) vanillin
(classification) chemistry, chemical science