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ip·so fac·to

(ĭpsō făktō)

adv.

By the fact itself; by that very fact: An alien, ipso facto, has no right to a US passport.

[New Latin ipsō factō : Latin ipsō, ablative of ipse, itself + Latin factō, ablative of factum, fact.]

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:

Indo-European Roots

Semitic Roots

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.

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