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  heptachlor heptagon  
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   The American Heritage® Dictionary of the English Language: Fourth Edition.  2000.
 
heptad
 
SYLLABICATION:hep·tad
PRONUNCIATION:  hptd
NOUN: A group or series of seven.
ETYMOLOGY:Greek heptas, heptad-, the number seven, from hepta, seven. See sept in Appendix I.
 
 
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
  heptachlor heptagon  
 
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