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octant
[ok-tuhnt]
noun
the eighth part of a circle.
Mathematics.any of the eight parts into which three mutually perpendicular planes divide space.
an instrument having an arc of 24°, used by navigators for measuring angles up to 90°.
the position of one heavenly body when 45° distant from another.
Astronomy.Octant, the constellation Octans.
octant
/ ˈɒəԳ /
noun
maths
any of the eight parts into which the three planes containing the Cartesian coordinate axes divide space
an eighth part of a circle
astronomy the position of a celestial body when it is at an angular distance of 45° from another body
an instrument used for measuring angles, similar to a sextant but having a graduated arc of 45°
Other 51Թ Forms
- octantal adjective
51Թ History and Origins
51Թ History and Origins
Origin of octant1
Example Sentences
“You have a real runaway success when it appeals to six or seven of those octants,” he says, citing “Wonka,” which grossed $632 million worldwide.
Excluded, of course, are those instruments normally made of wood, such as the octant and the mariners quadrant.
They intersect, two and two, in lines x′Ox, y′Oy, z′Oz, called the axes of x, y, z respectively, and divide all space into eight parts called octants.
Among the other items to sell well was a 19th Century ebony and brass octant, a measuring instrument, which went under the hammer for £400.
It is the sextant or some member of the sextant family - such as the quadrant, octant, etc.
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