agglutinate uhg looh ti nayt v string together (morphemes in an agglutinating language) v clump together; as of bacteria, red blood cells, etc. s united as if by glue Usage(s) Fluid from the infected chick eggs was mixed with samples of normal animal blood to see if the embryonic cells would agglutinate, or "clump" together; if they did, it would mean . Synonym(s) agglutinative