libra

1 capitalized a :  a southern zodiacal constellation between Virgo and Scorpio represented by a pair of scalesb (1) :  the seventh sign of the zodiac in astrology — see zodiac table (2) :  one born under the sign of Libra

2a plural libraeplay \ˈlī-ˌbrē, ˈlē-ˌbrī\ [L] :  an ancient Roman unit of weight equal to 327.45 gramsb [Spanish & Portuguese, from Latin] :  any of various Spanish, Portuguese, Colombian, or Venezuelan units of weight