Dictionary

equator

noun equa·tor \i-ˈkwā-tər, ˈē-ˌ\

Definition of EQUATOR

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 or a celestial body that is everywhere equally distant from the two poles and divides the surface into the northern and southern hemispheres
3
a :  a circle or circular band dividing the surface of a body into two usually equal and symmetrical parts
b :  equatorial plane <the equator of a dividing cell>
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Origin of EQUATOR

Middle English, from Medieval Latin aequator, literally, equalizer, from Latin aequare
First Known Use: 14th century

Other Cartography Terms

Robinson projection, benchmark, plat, projection, topography
EQUATOR Defined for Kids

equator

noun equa·tor \i-ˈkwā-tər\

Definition of EQUATOR for Kids

:  an imaginary circle around the earth everywhere equally distant from the north pole and the south pole
Medical Dictionary

equator

noun equa·tor \i-ˈkwāt-ər, ˈē-ˌ\

Medical Definition of EQUATOR

1
:  a circle or circular band dividing the surface of a body into two usually equal and symmetrical parts especially at the place of greatest width <the equator of the lens of the eye>
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