equator

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noun equa·tor \i-ˈkwā-tər, ˈē-ˌkwā-\

Definition of equator

  1. 1 :  the great circle of the celestial sphere whose plane is perpendicular to the axis of the earth

  2. 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. 3a :  a circle or circular band dividing the surface of a body into two usually equal and symmetrical partsb :  equatorial plane the equator of a dividing cell

  4. 4 :  great circle

Recent Examples of equator from the Web

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



EQUATOR Defined for Kids

equator

play
noun equa·tor \i-ˈkwā-tər\

Definition of equator for Students

  1. :  an imaginary circle around the earth everywhere equally distant from the north pole and the south pole


Medical Dictionary

equator

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noun equa·tor \i-ˈkwāt-ər, ˈē-ˌ\

Medical Definition of equator

  1. 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

  2. 2:  equatorial plane



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