noun
1. : the number of stars per unit area of a region of the sky
2. : the number of stars in a unit volume of space often expressed as per cubic parsec
noun
1. : the number of stars per unit area of a region of the sky
2. : the number of stars in a unit volume of space often expressed as per cubic parsec
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012