Meaning of DISPLACEMENT in English
A reaction in which a fragment of one reactant is replaced by another reactant (or by a fragent of another reactant). Displacement reactions have the same number of products as reactants, and are described by equations of the form A + BC AB + C (single displacement) or AB + CD AC + BD (double displacement).
General chemistry English glossary. Английский глоссарий общей химии. 2012