Source : Webster's Revised Unabridged Dictionary (1913)

Equidistant \E`qui*dis"tant\, a. [L. aequidistans, -antis;
   aequus equal + distans distant: cf. F. ['e]quidistant.]
   Being at an equal distance from the same point or thing. --
   {E`qui*dis"tant*ly}, adv. --Sir T. Browne.

Source : WordNet®

equidistant
     adj : the same distance apart at every point