equatorial

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adjective equa·to·ri·al \ ˌē-kwə-ˈtȯr-ē-əl , ˌe-kwə- \

Definition of equatorial

1 a :of, relating to, or located at the equator or an equator; also :being in the plane of the equator
  • a satellite in equatorial orbit
b :of, originating in, or suggesting the region around the geographic equator
2 a :being or having a support that includes two axles at right angles to each other with one parallel to the earth's axis of rotation
  • an equatorial telescope mount
b :extending in a direction essentially in the plane of a cyclic structure (as of cyclohexane)
  • equatorial hydrogens
— compare axial

Examples of equatorial in a Sentence

  1. a lush equatorial rain forest that is threatened by rampant development

Recent Examples of equatorial from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'equatorial.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of equatorial

1664

equatorial Synonyms

Synonyms
low, tropical
Antonyms
polar
Related Words
semitropical (also semitropic), subtropical (also subtropic)
Near Antonyms
temperate

EQUATORIAL Defined for English Language Learners

equatorial

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adjective

Definition of equatorial for English Language Learners

  • : of or relating to the equator : located at or near the equator


EQUATORIAL Defined for Kids

equatorial

play
adjective equa·to·ri·al \ ˌē-kwə-ˈtȯr-ē-əl , ˌe-kwə- \

Definition of equatorial for Students

:relating to or lying near the equator
  • an equatorial climate

Medical Dictionary

equatorial

play
adjective equa·to·ri·al \ ˌē-kwə-ˈtōr-ē-əl , ˌek-wə- , -ˈtȯr- \

medical Definition of equatorial

1 :of, located at, or relating to an equator
  • equatorial diameter
2 :extending in a direction essentially in the plane of a cyclic structure (as of cyclohexane)
  • equatorial hydrogen atoms
— compare axial 2b


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