septenary

• POS: Adjective, Noun
• HYPHEN: sep=te=nar=y

CIDE DICTIONARY

septenary, a. [L. septenairus, from septeni seven each, septem seven: cf. F. septénaire. See Seven. ].

•  Consisting of, or relating to, seven; as, a septenary number.  I. Watts.  [1913 Webster]
•  Lasting seven years; continuing seven years.  Fuller.  [1913 Webster]

septenary, n. 

 The number seven.  Holinshed.  [1913 Webster]

OXFORD DICTIONARY

septenary, adj. & n.
--adj. of seven, by sevens, on the basis of seven.
--n. (pl. -ies)
1 a group or set of seven (esp. years).
2 a septenarius.

Etymology

L septenarius (as SEPTENARIUS)