01 n. One of two great circles intersecting at right angles in the poles of the equator. One of them passes through the equinoctial points, and h…
pl.
Colures ((kō̇*lūrz"))
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1.
One of two great circles intersecting at right angles in the poles of the equator. One of them passes through the equinoctial points, and hence is denominated the equinoctial colure; the other intersects the equator at the distance of 90° from the former, and is called the solstitial colure.(Astron. & Geog.)“Thrice the equinoctial line He circled; four times crossed the car of night From pole to pole, traversing each colure.” — Milton.