1. The act or process of agglutinating; adhesion of distinct parts.
2. A clumped mass of material formed by agglutination. Also called agglutinate.
3. Biology The clumping together of cells or particles, especially bacteria or red blood cells, usually in the presence of a specific antibody or other substance.
4. Linguistics The formation of words from morphemes that retain their original forms and meanings with little change during the combination process.
ag·gluti·na′tive (-n-ā′tĭv, -ə-tĭv) adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.