ful·gu·rate (flgyə-rāt′, -gə-, fŭl-)
v. ful·gu·rat·ed, ful·gu·rat·ing, ful·gu·rates
To emit flashes of lightning.
1. To emit (light) in flashes.
2. Medicine To destroy (abnormal tissue, for example) by electric current.
[Latin fulgurāre, fulgurāt-, from fulgur, lightning; see bhel-1 in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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.