topology
to.pol.o.gy \-je-\ n [ISV] 1: topographical study of a particular place; specif : the history of a region as indicated by its topography 2: the anatomy of a particular region of the body 3: a branch of mathematics that investigates the properties of a geometric configuration (as a point set) that are unaltered if the configuration is subjected to a one-to-one continuous transformation in both directions