The Collaborative International Dictionary of English v.0.48:

Musa \Mu"sa\, prop. n.; pl. Musae. [NL., fr. Ar. mauz, mauza,
   banana.] (Bot.)
   A genus of perennial, herbaceous, endogenous plants of great
   size, including the banana (Musa sapientum), the plantain
   (Musa paradisiaca of Linnaeus, but probably not a distinct
   species), the Abyssinian (Musa Ensete), the Philippine
   Island (Musa textilis, which yields Manila hemp), and about
   eighteen other species. See Illust. of Banana and
   Plantain.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Musa
    n 1: type genus of the Musaceae: bananas [syn: Musa, genus
         Musa]