Octant

[ɒktәnt]

解释:

(noun.) a measuring instrument for measuring angles to a celestial body; similar to a sextant but with 45 degree calibration.

整理:胡安妮塔--From WordNet

解释:

(n.) The eighth part of a circle; an arc of 45 degrees.

(n.) 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 45 degrees.

(n.) An instrument for measuring angles (generally called a quadrant), having an arc which measures up to 9O¡, but being itself the eighth part of a circle. Cf. Sextant.

(n.) One of the eight parts into which a space is divided by three coordinate planes.

整理:塞丽娜

解释:

n. the eighth part of a circle: an instrument for measuring angles: the aspect of two planets when 45? or one-eighth of a circle apart.—Also Oc′tile.

整理:辛克莱