mel·lif·lu·ous (muh-lif-loo-uhs | məˈlɪfluəs)
Middle English < Latin

adjective
1) sweetly or smoothly flowing; sweet-sounding
2) flowing with honey; sweetened with or as if with honey 

The most noteworthy thing about him is his mellifluous voice. 

Submitted by practicaljoke. 

(Source: dictionary.reference.com)