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entity go
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
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chemical, chemical substance go
material produced by or used in a reaction involving changes in atoms or molecules
material produced by or used in a reaction involving changes in atoms or molecules
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compound, chemical compound go
(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
(chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
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ethylene, ethene
a flammable colorless gaseous alkene
a flammable colorless gaseous alkene
noun.substance
1 Subcategories
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trichloroethylene, trichloroethane, TCE go
a heavy colorless highly toxic liquid used as a solvent to clean electronic components and for dry cleaning and as a fumigant