hy·per·sphere 
(hīpər-sfîr′)
(hīpər-sfîr′)n.
Any of a set of objects resulting from the generalization of a two-dimensional circle and a three-dimensional sphere to n dimensions. In n-dimensional space, a hypersphere is the set of all points that are a given distance, called the radius, from a given point, called the center.
- catchable
- catch a crab
- catchall
- catch-as-catch-can
- catch basin
- catch breath
- catch death
- catcher
- catch fire
- catchfly
- catchiness
- catching
- catch it
- catchment
- catchment area
- catch on
- catch (one's) breath
- catch one's breath
- catch (one's) death
- catch one's death
- catch out
- catchpenny
- catch phrase
- catchpole
- catchpoll