noun
: a propulsive device that consists of a flat material (as aluminized plastic) designed to receive thrust from solar radiation pressure and that can be attached to a spacecraft
noun
: a propulsive device that consists of a flat material (as aluminized plastic) designed to receive thrust from solar radiation pressure and that can be attached to a spacecraft
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012