1. Of, relating to, containing, or conveying semen or seed.
2. Of, relating to, or having the power to originate; creative.
3. Highly influential in an original way; constituting or providing a basis for further development: a seminal idea in the creation of a new theory.
[Middle English, from Old French, from Latin sēminālis, from sēmen, sēmin-, seed; see SEMEN.]
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.