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octant

oc·tant

octant

 
pronunciation:
ak tnt
features:
Word Parts
part of speech: noun
definition 1: an eighth of a circle, or the arc or area it includes.
definition 2: a navigational instrument like the sextant but with an angle of only forty-five degrees.
definition 3: the position of one celestial body forty-five degrees away from another.
definition 4: any of the eight parts into which three-dimensional space is divided by three mutually perpendicular planes.
derivation: octantal (adj.)
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