grav·i·sphere 
(grăvĭ-sfîr′)
(grăvĭ-sfîr′)n.
The spherical region of space dominated by the gravitational field of a celestial body.
[GRAVI(TY) + SPHERE.]
- practice teacher
- practice teaching
- practicing
- practicum
- practise
- practitioner
- Prader-Willi syndrome
- praedial
- praemorse
- praemorse
- praemunire
- praenomen
- praenominal
- praetor
- praetorial
- praetorian
- Praetorian Guard
- praetorship
- pragmatic
- pragmatical
- pragmatically
- pragmatics
- pragmatic sanction
- pragmatism
- pragmatist