ASTROPHYSICS

[as.tro.phys.ics] n pl but sing or pl in constr [ISV] (1890): a branch of astronomy dealing esp. with the behavior, physical properties, and dynamic processes of celestial objects and phenomena -- as.tro.phys.i.cal adj -- as.tro.phys.i.cal.ly adv -- as.tro.phys.i.cist n