Longman Dictionary of Contemporary English homepage

Date: 1300-1400
Language: Medieval Latin
Origin: aequator 'equalizer', from Latin aequare ( EQUATE); because day and night are equal at the equator

equator

noun
     
e‧qua‧tor , Equator
SG

the equator

an imaginary line drawn around the middle of the Earth that is exactly the same distance from the North Pole and the South Pole
on/at/near the equator
a small village near the equator

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