\Sep*ten"tri*on\, n. [L. septentrio the northern
regions, the north, fr. septentriones the seven stars near
the north pole, called Charles's Wain, or the Great Bear,
also those called the Little Bear; properly, the seven plow
oxen; septem seven + trio, orig., a plow ox: cf. F.
septentrion.]
The north or northern regions. --Shak.
      Both East West, South and Septentrioun.  --Chaucer.

\Sep*ten"tri*on\, Septentrional \Sep*ten"tri*on*al\,
a. [L. septentrionalis: cf. F. septentrional.]
Of or pertaining to the north; northern. ``From cold
septentrion blasts.'' --Milton.