D defs.my
Entry 1 sense Webster, 1913

hypersphere

/(hī"pẽr*sfēr)/ · hy·per·sphere · IPA /ˈhaɪ.pəˌsfɪɹ/
01 n. A mathematical object existing in more than three dimensions, analogous to the sphere in that all points on the surface are equidistant fro…
  1. 1.
    A mathematical object existing in more than three dimensions, analogous to the sphere in that all points on the surface are equidistant from the central point; a generalization of a sphere in more than three dimensions.