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octant

n. 八分圆,八分仪,离角45度的位置

八分圆,八分仪,离角45度的位置

WordNet (r) 3.0 (2006) (WordNet)

octant
n 1: a measuring instrument for measuring angles to a celestial
body; similar to a sextant but with 45 degree calibration

The Collaborative International Dictionary of English v.0.48 (gcide)

Octant \Oc"tant\, n. [L. octans, -antis. fr. octo eight. See
{Octave}.]
1. (Geom.) The eighth part of a circle; an arc of 45 degrees.
[1913 Webster]

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.
[1913 Webster]

3. An instrument for measuring angles (generally called a
{quadrant}), having an arc which measures up to 9O[deg],
but being itself the eighth part of a circle. Cf.
{Sextant}.
[1913 Webster]

4. (Math. & Crystallog.) One of the eight parts into which a
space is divided by three coordinate planes.
[1913 Webster]

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单词	字典	翻译
Octant	查看　Octant　在百度字典中的解释	百度英翻中〔查看〕
Octant	查看　Octant　在Google字典中的解释	Google英翻中〔查看〕
Octant	查看　Octant　在Yahoo字典中的解释	Yahoo英翻中〔查看〕

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