[kəˈl(j)ʊə], (Noun)

Definitions:
- either of two great circles intersecting at right angles at the celestial poles and passing through the ecliptic at either the equinoxes or the solstices


Phrases:

Origin:
late Middle English: from late Latin coluri (plural), from Greek kolourai (grammai) ‘truncated (lines)’, from kolouros ‘truncated’, so named because the lower part is permanently cut off from view