Толковый словарь английского языка - agglutination

noun Date: 1541 the action or process of agglutinating, a mass or group formed by the union of separate elements, the formation of derivational or inflectional words by putting together constituents of which each expresses a single definite meaning, a reaction in which particles (as red blood cells or bacteria) suspended in a liquid collect into clumps and which occurs especially as a serologic response to a specific antibody