equator
Concise Oxford English Dictionary © 2008 Oxford University Press:
equator /ɪˈkweɪtə/
▶noun a line notionally drawn on the earth equidistant from the poles, dividing the earth into northern and southern hemispheres and constituting the parallel of latitude 0°. ■short for celestial equator.
– origin ME: from med. L. aequator, in the phr. circulus aequator diei et noctis ‘circle equalizing day and night’, from L. aequare (see equate).
'equator' also found in these Oxford entries:
aclinic line
- Aries
- armillary sphere
- azimuthal projection
- celestial equator
- declination
- equatorial
- equinoctial
- equinoctial point
- equinox
- galactic
- galactic equator
- geographical latitude
- geographical mile
- hemisphere
- latitude
- line
- low
- magnetic equator
- Mercator projection
- node
- right ascension
- sea mile
- shellback
- trade wind
- tropic
