the figure of the moon in its first or last quarter, resembling a segment of a ring tapering to points at the ends
the fainter of the two stars that constitute a double or binary star
a bright red supergiant star in the constellation Orion
the distance traversed by light in one mean solar year, about 5.88 trillion mi. (9.46 trillion km)
any of various groups of stars to which definite names have been given and the section of the heavens occupied by such a group, such as Ursa Major, Andromeda
a zodiacal constellation between Virgo and Serpens also called the Balance