reaction mixture

Short definition from Wiktionary

Noun

1. 1
   A product of mixing and reacting two or more substances (causing reaction); mixture causing chemical transformation or change; the interaction of entities : the state resulting from such a reaction
2. 2
   A product of mixing and reacting two or more substances (causing reaction); mixture causing chemical transformation or change; the interaction of entities : a process involving change in atomic nuclei
3. 3
   A product formed by the combination of two or more elements, compounds or substances together causing reactions and transformation of original items or substances.