Definition of: alligation

(al′ə·gā′shən) noun
Formerly, the method of finding or rule for finding the relation between the prices of the ingredients in a mixture, their proportions, quality, and the price of the mixture. In alligation alternate the proportion is required, the other two quantities being given: in alligation medial the cost of the mixture is required. [<L alligatio, -onis <alligare <ad-to + ligare bind]