Definitions for octantˈɒk tənt
Random House Webster's College Dictionary
the eighth part of a circle.
any of the eight parts into which three mutually perpendicular planes divide space.
an instrument having an arc of 24°, used by navigators for measuring angles up to 90°.
the position of one heavenly body when 45° distant from another.
Origin of octant:
1680–90; < L octant-, s. of octāns=oct(ō)eight+-āns, as in quadrānsquadrant
a measuring instrument for measuring angles to a celestial body; similar to a sextant but with 45 degree calibration
The eighth part of a circle; an arc of 45 degrees.
: The eighth part of a disc; a sector of 45 degrees; half a quadrant.
: An instrument for measuring angles, particularly of elevation.
Origin: From octans