[1] : The Collaborative International Dictionary of English v.0.48

alligation \al`liga"tion\, n. l. alligatio.
   1. the act of tying together or attaching by some bond, or
      the state of being attached. r.
      1913 webster

   2. arith. a rule relating to the solution of questions
      concerning the compounding or mixing of different
      ingredients, or ingredients of different qualities or
      values.
      1913 webster

   note: the rule is named from the method of connecting
         together the terms by certain ligature-like signs.
         alligation is of two kinds, medial and alternate;
         medial teaching the method of finding the price or
         quality of a mixture of several simple ingredients
         whose prices and qualities are known; alternate,
         teaching the amount of each of several simple
         ingredients whose prices or qualities are known, which
         will be required to make a mixture of given price or
         quality.
         1913 webster

Alligation >> A Words
Alligation, definition of term: Alligation
alligation_pag1.html