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bis-

pref.

Two. Used especially in chemical nomenclature instead of di- when referring to a complex structural feature: bisphenol.

[Latin, twice; see dwo- in the Appendix of Indo-European roots.]

bis

(bĭs)

adv.
Music

Again; twice. Used as a direction to repeat a passage.

interj.

Used to request an additional performance.

[French or Italian, both from Latin; see dwo- in the Appendix of Indo-European roots.]

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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