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septennium
septet
septi-
septic
septic tank
septicaemia
septicemia
septicidal
septillion
septime
septuagenarian
Septuagesima
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septillion
sep·til·lion [ sep tíllyən ] (plural sep·til·lions or sep·til·lion)


noun 
Definition:
 
1. U.S. 1024: the number equal to 1024, written as 1 followed by 24 zeros
2. U.K. 1042: the number equal to 1042, written as 1 followed by 42 zeros ( dated )

[Late 17th century. < French< sept "seven" + -illion as in million]

sep·til·lion adjective
sep·til·lionth adjective, noun
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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