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ex·tinct

(ĭk-stĭngkt)

adj.

1. No longer existing or living: an extinct species. See Synonyms at dead.

2. No longer burning or active: an extinct volcano.

3. No longer in use: an extinct custom.

[Middle English, from Latin exstīnctus, past participle of exstinguere, to extinguish; see EXTINGUISH.]

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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