Septenary

Septenary

The septenary numeral system is the base-num|7 number system, and uses the digits 0-6.

Multiplication table

One advantage of this system is that 3.1 (22/7) is a reasonably good approximation for Pi.

In Fiction

*The Tau of Sci-fi Table-top battle game "Warhammer 40,000" use a base-7 counting system.

*In the TV series "Doctor Who" the time lords employ a number system using base 7.

*The Halo 3 Alternate Reality Game "IRIS" used a countdown clock in base-7.


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  • Septenary — Sep ten*a*ry, a. [L. septenairus, from septeni seven each, septem seven: cf. F. sept[ e]naire. See {Seven}. ] 1. Consisting of, or relating to, seven; as, a septenary number. I. Watts. [1913 Webster] 2. Lasting seven years; continuing seven years …   The Collaborative International Dictionary of English

  • Septenary — Sep ten*a*ry, n. The number seven. [R.] Holinshed. [1913 Webster] …   The Collaborative International Dictionary of English

  • septenary — [sep′tə ner΄ē, sep ten′ə rē] adj. [L septenarius < septem, SEVEN] 1. of the number seven 2. consisting of or forming a group of seven 3. SEPTENNIAL n. pl. septenaries a group or set of seven, esp. seven years …   English World dictionary

  • septenary — adjective a) Consisting of or containing seven. ... 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 …   Wiktionary

  • Septenary (Theosophy) — The Septenary in H.P. Blavatsky s teachings refers to the seven principles of man. In The Key to Theosophy , pp.90 93 she presents a synthesis of Eastern (Advaita Vedanta, Samkhya) and Western (Platonism, 19th century Occultism) ideas, according… …   Wikipedia

  • Septenary Cycle — The septenary cycle is the seven year cycle of planetary rulership used in classical European astrology. A year begins at the moment of the vernal equinox, when the Sun enters the sign of Aries. The cycle begins with the year of Mars (since it is …   Wikipedia

  • septenary — /sep teuh ner ee/, adj., n., pl. septenaries. adj. 1. of or pertaining to the number seven or forming a group of seven. 2. septennial. n. 3. a group or set of seven. 4. a period of seven years. 5. the number seven. 6. Pros. a line of seven feet.… …   Universalium

  • septenary — sep·te·nar·y || sep tenÉ™rɪ /sep tɪːnrɪ n. group of seven items; period of seven years; number 7 adj. pertaining to the number 7; of a period of seven years; occurring every seven years; comprising a group of seven items …   English contemporary dictionary

  • septenary — [ sɛptɪn(ə)ri, ti:n(ə)ri] adjective relating to or divided into seven. noun (plural septenaries) a group or set of seven, in particular a period of seven years. Origin ME: from L. septenarius (see septenarius) …   English new terms dictionary

  • septenary — sep·tenary …   English syllables

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