L wave
–noun | an earthquake wave that travels around the earth's surface and is usually the third conspicuous wave to reach a seismograph. |
long wave n. A radio wave with a wavelength in excess of 1000 meters. |
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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