1. Related on or descended from the father's or male side.
2. Coming from a common source; akin.
A relative on the father's or male side only.
[Latin agnātus, past participle of agnāscī, to become an agnate : ad-, ad- + nāscī, to be born; see genə- in the Appendix of Indo-European roots.]
ag·natic (ăg-nătĭk) 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.