(a.) Being at an equal distance from the same point or thing.

aligned amidships analogous average center centermost central coextending coextensive collateral concurrent core equal equatorial equispaced even halfway interior intermediary intermediate lined up mean medial median mediocre mediterranean medium mesial mezzo mid middle middlemost middling midland midmost midships midway nonconvergent nondivergent nuclear parallel parallelepipedal parallelinervate paralleling parallelodrome parallelogrammatic parallelogrammic parallelotropic