Ōc'tant, n.

n. [Lat. octans, octantis, from octo, eight; Fr. octant, Sp. octante, It. ottante.]

1. (Geom.) The eighth part of a circle; an arc containing forty five degrees.
2. (Astron. & Astrol.) The position or aspect of a heavenly body, as the moon or a planet, when half way between conjunction, or opposition, and quadrature, or distant from another body forty-five degrees.