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heptarchy
heptastich
Heptateuch
heptathlon
heptatonic
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heptad
hep·tad [ hép tàd ] (plural hep·tads)


noun 
Definition:
 
group of seven: a set or series of seven
[Mid-17th century. < Greek heptad- "the number seven" < hepta "seven"]
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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