ge·ne·al·o·gy (jē′nē-ŏlə-jē, -ăl-, jĕn′ē-)
n. pl. ge·ne·al·o·gies
1. A record or table of the descent of a person, family, or group from an ancestor or ancestors; a family tree.
2. Direct descent from an ancestor; lineage or pedigree.
3. The study or investigation of ancestry and family histories.
[Middle English genealogie, from Old French, from Late Latin geneālogia, from Greek geneālogiā : geneā, family; see genə- in the Appendix of Indo-European roots + -logiā, -logy.]
ge′ne·a·logi·cal (-ə-lŏjĭ-kəl) adj.
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.