Reference > American Heritage® > Dictionary > Illustrations > spring tide
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The American Heritage® Dictionary of the English Language: Fourth Edition.   2000.
 
spring tide.
 
 
Spring tides occur when the sun and moon are directly in line with the earth and their gravitational pulls reinforce each other.
(Source: Precision Graphics)
 
The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved.
 
CONTENTS · INDEX · ILLUSTRATIONS · BIBLIOGRAPHIC RECORD
  spinal column spur gear  
 
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