from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A small molecule that reacts with a specific antibody but cannot induce the formation of antibodies unless bound to a carrier protein or other large antigenic molecule.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any small molecule that can elicit an immune response only when attached to a large carrier such as a protein.
German : Greek haptein, to fasten + German -en, n. suff. (from Greek -ēnē, -ene).(American Heritage® Dictionary of the English Language, Fourth Edition)
From German Hapten (Wiktionary)