Pronunciation: (ē"kwu-tôr'ē-ul, -tōr'-, ek"wu-),[key] —adj. 1. of, pertaining to, or near an equator, esp. the equator of the earth.
2. of, like, or typical of the regions at the earth's equator: equatorial temperatures.
—n. a telescope mounting having two axes of motion, one parallel to the earth's axis and one at right angles to it.