Colure /(kō̇*lūr")/

pl. Colures ((kō̇*lūrz"))

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.