| 单词 | octant |
| 释义 | Word Frequency octant(ˈɒktənt) noun 1. mathematics a. any of the eight parts into which the three planes containing the Cartesian coordinate axes divide space b. an eighth part of a circle 2. astronomy the position of a celestial body when it is at an angular distance of 45° from another body 3. an instrument used for measuring angles, similar to a sextant but having a graduated arc of 45° Word origin C17: from Latin octans half quadrant, from octo eight |
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