[ag.glu.ti.na.tion] n (1541) 1: the action or process of agglutinating
2: a mass or group formed by the union of separate elements
3: the formation of derivational or inflectional words by putting together constituents of which each expresses a single definite meaning
4: a reaction in which particles (as red blood cells or bacteria) suspended in a liquid collect into clumps and which occurs esp. as a serologic response to a specific antibody