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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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英文字典中文字典相关资料:

Octant (instrument) - Wikipedia
The lower price of the octant, including versions without telescope, made it a practical instrument for ships in the merchant and fishing fleets One common practice among navigators up to the late nineteenth century was to use both a sextant and an octant
Octant
Visualize your Kubernetes workloads Octant is an open source developer-centric web interface for Kubernetes that lets you inspect a Kubernetes cluster and its applications
OCTANT Definition Meaning - Merriam-Webster
The meaning of OCTANT is an instrument for observing altitudes of a celestial body from a moving ship or aircraft
Octant | National Museum of American History
Description An octant measures angles by bringing two images together—that of the sun, for instance, and the horizon—and was used primarily to determine latitude at sea The form was described by John Hadley in London in 1731 and still in use in the early twentieth century
Octant | instrument | Britannica
In the octant and the sextant, two mirrors—one fixed, the other movable—bring the image of the Sun into coincidence with the horizon …
Octant vs. Sextant — What’s the Difference?
An octant, also known as a reflecting quadrant, is a measuring instrument that spans 45 degrees or one-eighth of a circle It was widely used in the 18th century for navigation
Octants — Definition, Examples Table - Mathwords
Octants appear frequently in multivariable calculus when you set up triple integrals over regions of 3D space—problems often say "in the first octant," meaning you restrict all variables to positive values
paselkr1 - Octant or Reflecting Quadrant - Google Sites
The octant measures angles up to 90° (a quadrant) using a 45° arc (an octant) and reflecting optics that double the angle The ivory scale is graduated to 20' and can be read to 1' using the
octant, n. meanings, etymology and more | Oxford English Dictionary
octant, n meanings, etymology, pronunciation and more in the Oxford English Dictionary

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