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valency |
Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia, Hutchinson | 0.03 sec. |
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valency (vāˑ·len·sē), n the number of chemical bonds that an atom of a particular element can form, used as a measure of the chemical reactivity of that element. valency, valence 1. the numerical measure of the capacity to combine; in chemistry, an expression of the number of atoms of hydrogen (or its equivalent) that one atom of a chemical element can hold in combination, if negative, or displace in a reaction, if positive. 2. in immunology, an expression of the number of antigenic determinants with which one molecule of a given antibody can combine. |
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