The Collaborative International Dictionary of English v.0.48:
bel canto \bel canto\ (b[e^]l k[aum]n"t[-o]), n. [It., beautiful singing.] (Music) a cantabile style of operatic singing characterized by purity and evenness of tone, and a precise but brilliant vocal technique displaying ease and agility. [PJC]WordNet (r) 3.0 (2006):
bel canto n 1: a style of operatic singing