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
4 : great circle
Recent Examples of equator from the Web
But specific populations are very local; the orca communities that live in the Pacific Northwest stay there, and those in the Antarctic stay south of the equator.
This high orbit above Earth's equator is therefore valuable and increasingly cluttered real estate.
SpaceX launched the first 10 Iridium NEXT satellites from Vandenberg on Jan. 14, putting the spacecraft into a near-polar orbit tilted 86.4 degrees to the equator, one of six orbital planes used by the company to create its network.
At the equator, days and nights are equal throughout the year.
To get around this issue, Gleason angles two rows of panels slightly off the wall’s perpendicular: In North America, solar panels also usually face south, toward the equator.
All of the planets in our solar system orbit the sun's equator.
Sea surface temperatures around the equator are higher than average but not quite enough to meet the criteria.
According to NASA, they are determined based on the Earth's tilt on its axis and the sun's alignment over the equator.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'equator.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of equator
Middle English, from Medieval Latin aequator, literally, equalizer, from Latin aequare
First Known Use: 14th centurySee Words from the same year
EQUATOR Defined for Kids
Definition of equator for Students
: an imaginary circle around the earth everywhere equally distant from the north pole and the south pole
Seen and Heard
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