equator
equa.tor \i-'kwa-t-*r, 'e--.kwa-t-\ n [ME, fr. ML aequator, lit.,
equalizer, fr. L aequatus; fr. its cont]aining the equinoxes 1: the great
circle of the celestial sphere whose plane is perpendicular to the axis of
the earth 2: a great circle of the earth that is everywhere equally distant
from the two poles and divides the earth's surface into the northern and
southern hemispheres 3: a circle or circular band dividing the surface of a
body into two usu. e qual and symmetrical parts 4: GREAT CIRCLE