The Collaborative International Dictionary of English v.0.48:
Sorgo \Sor"go\, n. [Cf. It. sorgo. See Sorghum.] (Bot.) Indian millet and its varieties. See Sorghum. [1913 Webster]WordNet (r) 3.0 (2006):
sorgo n 1: any of several sorghums cultivated as a source of syrup [syn: sorgo, sorgho, sweet sorghum, sugar sorghum]