[f. COMBINE v. + -ING1.] The action of the vb. COMBINE; rarely concr. Combination.
1542. Recorde, Gr. Artes (1575), 425. I will propound an other example of more varietie in the Alligations or combinings.
1598. Florio, Combinatione, a combining or joyning togither.
1603. Knolles, Hist. Turks (1638), 264. Being inflate with the combining of two such mighty kingdoms.
b. attrib. in combining proportions, equivalents, etc. (Chem.), the proportions, etc., in which elements or radicals combine with each other.
1866. Argyll, Reign Law, ii. (ed. 4), 95. Each elementary substance has its own combining proportions with other elements.