septenary

Definition from Wiktionary, a free dictionary

[edit] English

[edit] Adjective

septenary (not comparable)

1. Of seventh rank or order.
   • 1899 October, W J McGee, The Beginning of Mathematics, in American Anthropologist 1(4), page 657, [1]

     ... indeed if further evidence than that of bestial and savage counting were required to show that finger-numeration and the quinary system were not primeval, it would be afforded by the development of the senary-septenary system in so many lands.

[edit] See also

• primary (1)
• secondary (2)
• tertiary (3)
• quaternary (4)
• quinary (5)
• senary (6)
• octonary (8)
• nonary (9)
• denary (10)
• duodenary (12)
• vigenary (20)