1. A chemical substance that is present at the start of a chemical reaction

Derived forms: reactants

See also: react

Type of: chemical, chemical substance

Encyclopedia: Reactant

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• packet boat
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• packing
• packing box
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• packing needle
• packing nut
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• pact
• pad
• pad of paper
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• Padda
• Padda oryzivora
• padded
• padder