The parallel of latitude that runs 66° 33′ 39″ north of the Equator, which marks approximately the southernmost place in the Northern Hemisphere where the sun does not set on the summer solstice and does not rise on the winter solstice.

(geography) The line which marks approximately the northernmost place in the Southern Hemisphere where the sun does not set on the summer solstice and does not rise on the winter solstice.

present participle of circle the wagons

(US, Canada) an intersection with a circular shape and, usually, a central island

An area in a field of crops where the stalks have been flattened into a circle or other geometric shape.

Instrument for measuring azimuths. It is a graduated circle on a sight, gun carriage, searchlight, etc.

(mathematics) The problem, proposed by ancient Greek geometers, of using a finite ruler-and-compass construction to make a square with the same area as a given circle.

a circle formed by a plane that cuts a sphere not through its centre

(netball) One of two semicircles in the goal thirds, radius 4.9 metres, in which the goal shooter and goal attack can shoot.

present participle of square the circle