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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
base, alkali
any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
noun.substance
6 Subcategories
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pyridine go
a toxic colorless flammable liquid organic base with a disagreeable odor
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purine go
a colorless crystalline organic base containing nitrogen
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purine go
any of several bases that are derivatives of purine
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imidazole, iminazole, glyoxaline go
an organic base C3H4N2
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melamine, cyanuramide go
a white crystalline organic base
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pyrimidine go
any of several basic compounds derived from pyrimidine