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Definition of Combining weight
1. Noun. The atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen.
Exact synonyms: Eq, Equivalent, Equivalent Weight
Generic synonyms: Atomic Mass, Atomic Weight, Relative Atomic Mass
Generic synonyms: Atomic Mass, Atomic Weight, Relative Atomic Mass
Medical Definition of Combining weight
1. The weight in grams of an element that combines with or replaces 1 gram of hydrogen, the atomic or molecular weight in grams of an atom or group of atoms involved in a chemical reaction divided by the number of electrons donated, taken up, or shared by the atom or group of atoms in the course of that reaction, the weight of a substance contained in 1 liter of 1 normal solution; a variant of. Synonym: combining weight, equivalent weight. (05 Mar 2000)