noun
Abbr. ULFAn electromagnetic wave whose frequency is less than 3,000 hertz.
ultralow frequency
ul·tra·low frequencyTHE AMERICAN HERITAGE® DICTIONARY OF THE ENGLISH LANGUAGE, FIFTH EDITION by the Editors of the American Heritage Dictionaries. Copyright © 2016, 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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"Ultralow frequency." YourDictionary. LoveToKnow. www.yourdictionary.com/ultralow-frequency.
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Ultralow frequency. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/ultralow-frequency
