Chemical
chemical

chem·i·cal [ kem-i-kuhl ]
Definitions related to chemicals:
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A substance made up of elements, such as hydrogen or sodium.NCI Dictionary of Cancer TermsU.S. National Cancer Institute, 2021
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A substance with a defined atomic or molecular structure that results from, or takes part in, reactions involving changes in its structure, composition, or properties.NCI ThesaurusU.S. National Cancer Institute, 2021
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Tree section heading for terms covering drugs, reagents, biomolecules, and other chemical compounds.CRISP ThesaurusNational Institutes of Health, 2006
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(chemical substance) A substance that is fully defined by an organic or inorganic chemical formula, includes mixtures of other chemical substances. Refine using, e.g., IUPAC codes.NCI Health Level 7 VocabularyU.S. National Cancer Institute, 2018
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