con·nois·seur (kŏn′ə-sûr, -sr)
1. A person with expert knowledge or training, especially in the fine arts.
2. A person of informed and discriminating taste: a connoisseur of fine wines.
[Obsolete French, from Old French connoisseor, from connoistre, to know, from Latin cognōscere, to learn, know; see COGNITION.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.