1630s, in a medical sense, from Latin agglutinat-, past participle stem of agglutinare (see agglutination). Philological sense is from 1650s.
agglutinative ag·glu·ti·na·tive (ə-glōōt'n-ā'tĭv, -ə-tĭv)
adj.
Concerning or characteristic of agglutination.