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i·so·prene

(īsə-prēn′)

A colorless volatile liquid, C₅H₈, used chiefly to make synthetic rubber.

[ISO- + PR(OPYL)ENE.]

i′so·prenoid′ (-prēnoid′) adj.

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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