Definition of octant in English:

octant

noun ˈɒkt(ə)ntˈɑktənt

1An arc of a circle equal to one eighth of its circumference, or the area enclosed by such an arc with two radii of the circle.
八分弧；八分圆
Example sentencesExamples
- Included in those downloads are the last two octants needed to complete the color, 360-degree ‘mission success' panorama.
- The arc was extended from an octant to a sextant and a stout handle was added at the back of the instrument.
1. 1.1 Each of eight parts into which a space or solid body is divided by three planes which intersect (especially at right angles) at a single point.
  （由三个平面正交分割而成的）卦限八分区之一
  Example sentencesExamples
  At the octant (eight-cell) stage the embryo proper and suspensor are clearly distinct.
  The model put forward for the action of BDL suggests that auxin is involved in determining hypophyseal cell fate at the octant stage.
2. 1.2 An obsolete instrument in the form of a graduated eighth of a circle, used in astronomy and navigation.
  八分仪
  Example sentencesExamples
  Clark used celestial observation to determine latitude, triangulating position with an octant.
  Instead of compasses, octants, and two-pole chains, modern digital GPS units determine position and direction.

Origin

Late 17th century: from Latin octans, octant- 'half-quadrant', from octo 'eight'.

Definition of octant in US English:

octant

nounˈäktəntˈɑktənt

1An arc of a circle equal to one eighth of its circumference, or the area enclosed by such an arc with two radii of the circle.
八分弧；八分圆
Example sentencesExamples
- Included in those downloads are the last two octants needed to complete the color, 360-degree ‘mission success' panorama.
- The arc was extended from an octant to a sextant and a stout handle was added at the back of the instrument.
1. 1.1 Each of eight parts into which a space or solid body is divided by three planes which intersect (especially at right angles) at a single point.
  （由三个平面正交分割而成的）卦限八分区之一
  Example sentencesExamples
  At the octant (eight-cell) stage the embryo proper and suspensor are clearly distinct.
  The model put forward for the action of BDL suggests that auxin is involved in determining hypophyseal cell fate at the octant stage.
2. 1.2 An obsolete instrument in the form of a graduated eighth of a circle, used in astronomy and navigation.
  八分仪
  Example sentencesExamples
  Clark used celestial observation to determine latitude, triangulating position with an octant.
  Instead of compasses, octants, and two-pole chains, modern digital GPS units determine position and direction.

Origin

Late 17th century: from Latin octans, octant- ‘half-quadrant’, from octo ‘eight’.

词汇	octant
释义	Definition of octant in English: octant noun ˈɒkt(ə)ntˈɑktənt 1An arc of a circle equal to one eighth of its circumference, or the area enclosed by such an arc with two radii of the circle. 八分弧；八分圆 Example sentencesExamples Included in those downloads are the last two octants needed to complete the color, 360-degree ‘mission success' panorama. The arc was extended from an octant to a sextant and a stout handle was added at the back of the instrument. 1.1 Each of eight parts into which a space or solid body is divided by three planes which intersect (especially at right angles) at a single point. （由三个平面正交分割而成的）卦限八分区之一 Example sentencesExamples At the octant (eight-cell) stage the embryo proper and suspensor are clearly distinct. The model put forward for the action of BDL suggests that auxin is involved in determining hypophyseal cell fate at the octant stage. 1.2 An obsolete instrument in the form of a graduated eighth of a circle, used in astronomy and navigation. 八分仪 Example sentencesExamples Clark used celestial observation to determine latitude, triangulating position with an octant. Instead of compasses, octants, and two-pole chains, modern digital GPS units determine position and direction. Origin Late 17th century: from Latin octans, octant- 'half-quadrant', from octo 'eight'. Definition of octant in US English: octant nounˈäktəntˈɑktənt 1An arc of a circle equal to one eighth of its circumference, or the area enclosed by such an arc with two radii of the circle. 八分弧；八分圆 Example sentencesExamples Included in those downloads are the last two octants needed to complete the color, 360-degree ‘mission success' panorama. The arc was extended from an octant to a sextant and a stout handle was added at the back of the instrument. 1.1 Each of eight parts into which a space or solid body is divided by three planes which intersect (especially at right angles) at a single point. （由三个平面正交分割而成的）卦限八分区之一 Example sentencesExamples At the octant (eight-cell) stage the embryo proper and suspensor are clearly distinct. The model put forward for the action of BDL suggests that auxin is involved in determining hypophyseal cell fate at the octant stage. 1.2 An obsolete instrument in the form of a graduated eighth of a circle, used in astronomy and navigation. 八分仪 Example sentencesExamples Clark used celestial observation to determine latitude, triangulating position with an octant. Instead of compasses, octants, and two-pole chains, modern digital GPS units determine position and direction. Origin Late 17th century: from Latin octans, octant- ‘half-quadrant’, from octo ‘eight’.
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