Entry 1 sense Webster, 1913 Balas ruby /băl'-əs ro͞ob'-ē/ · Bal·as ru·by · IPA 01 A variety of spinel ruby, of a pale rose red, or inclining to orange. See Spinel. 1. A variety of spinel ruby, of a pale rose red, or inclining to orange. See Spinel.(Min.) See: Spinel