octant

1. n. The eighth part of a circle; an arc of 45 degrees. Source: opted

2. 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. Source: opted

3. 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. Source: opted

4. n. One of the eight parts into which a space is divided by three coordinate planes. Source: opted

5. n. a measuring instrument for measuring angles to a celestial body; similar to a sextant but with 45 degree calibration Source: wordnet

6. 1. (Geom.) The eighth part of a circle; an arc of 45 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 45 degrees. 3. An instrument for measuring angles (generally called a quadrant), having an arc which measures up to 9Oº, but being itself the eighth part of a circle. Cf. Sextant. 4. (Math. & Crystallog.) One of the eight parts into which a space is divided by three coördinate planes. Source: webster

7. n. a measuring instrument for measuring angles to a celestial body; similar to a sextant but with 45 degree calibration Source: ecdict

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