Agglutination is the clumping of particles. The word agglutination comes from the Latin agglutinare, meaning "to glue." Agglutination occurs if an antigen is mixed with its corresponding antibody called isoagglutinin. This is commonly used term in blood grouping.
Agglutination is a term referring to the clumping together of suspended materials found with a fluid like red blood cells within blood. It usually occurs as a result of antibodies like immunoglobulin M.