Pyridine definitions

pĭr'ĭ-dēn'
Any of a class of organic compounds containing a six-member ring in which one of the carbon atoms has been replaced by a nitrogen atom. Pyridines include compounds used as water repellents, herbicides, and various drugs. The pyridine ring structure is also part of many larger compounds, including niacin and nicotine.
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The simplest of these compounds, a flammable, colorless or yellowish liquid base having a penetrating odor. It is used as a solvent and waterproofing agent and in the manufacture of various drugs and vitamins. Chemical formula: C5H5N.
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A flammable, colorless or yellowish liquid base, C5 H5 N, having a penetrating odor and serving as the parent compound of many biologically important derivatives. It is used as a solvent and waterproofing agent and in the manufacture of various drugs and vitamins.
noun
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A flammable, colorless or pale-yellow liquid base, C5H5N, having a sharp odor: it is produced in the distillation of coal tar or bone oil and is used in the synthesis of vitamins and drugs, as a solvent, etc.
noun
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A flammable, colorless or yellowish liquid base, C5 H5 N, having a penetrating odor and serving as the parent compound of many biologically important derivatives. It is used as a solvent and in the manufacture of various agricultural chemicals, rubber products, water repellents, dyes, and drugs.
noun
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(organic chemistry) Any of a class of aromatic heterocyclic compounds containing a ring of five carbon atoms and an nitrogen atom; especially the simplest one, C5H5N.
noun
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Origin of pyridine

pyr(o)– –id(e) –ine