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lateral line

the line, or system of lines, of sensory structures along the head and sides of fishes and amphibians, by which the animal is believed to detect water current and pressure changes and vibrations.
Origin of lateral line
1865-70 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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lateral line in Science
lateral line  
A series of tubelike canals along the head and sides of fish and some amphibians by which vibrations, as from water currents, and changes in pressure are detected.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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