Situated, like the earth's equator, equidistant from each end.
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equa·to·ri·al .ē-kwə-'tōr-ē-əl, .ek-wə-, -'tȯr- adj
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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equa·to·ri·al (e″kwə-torґe-əl) 1. pertaining to an equator. 2. occurring at the same distance from each extremity of an axis.Medical dictionary. 2011.