1. A treatment that enhances an existing medical regimen, as a pharmacological agent added to a drug to increase or aid its effect.
2. An immunological agent that increases the antigenic response.
1. Contributing to or enhancing an existing medical regimen: adjuvant chemotherapy.
2. or ad·ju·vant·ed (ăjə-vən-tĭd) Containing an adjuvant: an adjuvant vaccine.
[From Latin adiuvāns, adiuvant-, present participle of adiuvāre, to help; see AID.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The American Heritage Dictionary Blog
Check out our blog, updated regularly, for new words and revised definitions, interesting images from the 5th edition, discussions of usage, and more.