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| Antarctic Circle |
an imaginary line drawn around the earth parallel to the equator and north of the South Pole. |
| Arctic Circle |
an imaginary line drawn around the earth parallel to the equator and south of the North Pole. |
| armillary sphere |
an ancient sighting instrument formed of rings that are arranged in the positions of the tropics, equator, and the like. |
| Australasia |
Australia, New Zealand, and nearby islands south of the equator and north through Malaysia and the Philippines. |
| celestial equator |
a great circle, corresponding to the earth's equator, on the celestial sphere. |
| declination |
in astronomy, the angular distance of some object from the celestial equator. [1/5 definitions] |
| doldrums |
the ocean belt near the equator, characterized by calms and light, variable winds, or the characteristic weather of this region. [1/2 definitions] |
| equatorial |
of, relating to, near, or on any equator. [2/3 definitions] |
| Equatorial Guinea |
a small country near the equator on the west central coast of Africa, between Gabon and Cameroon. |
| equinoctial |
concerning the celestial equator. [2/5 definitions] |
| equinoctial circle |
see "celestial equator." |
| equinox |
either of the two times during the year when the sun crosses the earth's equator so that day and night are of equal duration worldwide, occurring in March and September. |
| Ethiopian |
of or belonging to Africa below or near the equator and the southern portion of the Arabian peninsula, as certain plant or animal species. [1/3 definitions] |
| geostationary |
of or pertaining to a satellite or spacecraft that travels around the earth's equator at a speed equal to the earth's rotation so as to maintain a constant relation to points on the earth's surface. |
| hemisphere |
either of two halves of the terrestrial globe, formed by dividing it into northern and southern parts at the equator, or into eastern and western parts at the prime meridian. [1/3 definitions] |
| horse latitudes |
the north and south latitudes at about thirty degrees north and south of the equator, marked by light winds, calms, and high pressure. |
| lat. |
abbreviation of "latitude," the angular distance between the equator and a point north or south on the earth's surface, as measured in degrees. |
| latitude |
the angular distance between the equator and a point north or south on the earth's surface, as measured in degrees. [1/3 definitions] |
| magnetic equator |
an imaginary line circling the earth near the equator, composed of points where a magnetic needle does not dip because the lines of magnetic force parallel the earth's surface. |
| Melanesia |
one of the three principal Pacific island groups, south of the equator, stretching from northeast of New Guinea to Fiji. (Cf. Micronesia, Polynesia.) |
| Mercator projection |
a map in which the meridians and the parallels of latitude are shown as straight lines that cross at right angles, and in which areas appear more distorted the farther they are from the equator. |
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