equatorial

1. 1. Of, relating to, or resembling the earth's equator.
   2. Relating to conditions that exist at the earth's equator: equatorial heat.
2. Having or constituting a support with two perpendicular axes, one of which is parallel to the earth's rotational axis.

An equatorial telescope.

The circle which divides the spherical object into two equal halves.

• e. region — the middle piece; said of spindle muscle fibers.

The adjective has 3 meanings:

Meaning #1: of or relating to or at an equator
  Pertains to noun: equator (meaning #2)

Meaning #2: of or relating to conditions at the geographical equator
  Pertains to noun: equator (meaning #1)

Meaning #3: of or existing at or near the geographic equator
  Antonym: polar (meaning #4)

Equatorial has different meanings:

• In geography it relates to the equator of the Earth.
• In meteorology, an Equatorial climate is the type of climate experienced near the equator.
• In geometry, it refers to the ring-shaped outer boundary of the cross-section of a round three dimensional shape or object, perpendicular to its long or major axis, at the object's midpoint or point of greatest radius (as in the equator of the Earth).
• In chemistry it relates to an equatorial bond or the plane of a molecule, the opposite of axial.
• Equatorial Guinea, a country in Central Africa
• In astronomy, equatorial coordinates are using a coordinate system based on the equatorial plane of the Earth
• In astronomy, it may refer to a particular telescope mount called an equatorial mount
• In orbital mechanics and equatorial orbit is one whose ground track lies along the equator of the moon or planet being orbited

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Common misspelling(s) of equatorial

• equitorial