pro·tu·ber·ate (prō-tbə-rāt′, -ty-, prə-)
intr.v. pro·tu·ber·at·ed, pro·tu·ber·at·ing, pro·tu·ber·ates
To swell or bulge.
[Late Latin prōtūberāre, prōtūberāt- : Latin prō-, forth; see PRO-1 + Latin tūber, a swelling; see teuə- in the Appendix of Indo-European roots.]
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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.