Search Result for "midpoint": 
Wordnet 3.0

NOUN (1)

1. a point equidistant from the ends of a line or the extremities of a figure;
[syn: center, centre, midpoint]



WordNet (r) 3.0 (2006):

midpoint
    n 1: a point equidistant from the ends of a line or the
         extremities of a figure [syn: center, centre,
         midpoint]