From WordNet (r) 3.0 (2006) [wn]:
midpoint
n 1: a point equidistant from the ends of a line or the
extremities of a figure [syn: center, centre,
midpoint]
From WordNet (r) 3.0 (2006) [wn]:
midpoint
n 1: a point equidistant from the ends of a line or the
extremities of a figure [syn: center, centre,
midpoint]