a. The condition or fact of being the child of a certain parent.
b. Law Judicial determination of the paternity of a nonmarital child for the purposes of compelling support.
2. A line of descent; derivation.
a. The act or fact of forming a new branch, as of a society or language group.
b. The branch thus formed.
[Medieval Latin fīliātiō, fīliātiōn-, quality of being a son, legal right of a son, from Latin fīlius, son; see dhē(i)- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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.