The Collaborative International Dictionary of English v.0.48:

Scudo \Scu"do\, n.; pl. Scudi. [It., a crown, a dollar, a
   shield, fr. L. scutum a shield. Cf. Scute.] (Com.)
   (a) A silver coin, and money of account, used in Italy and
       Sicily, varying in value, in different parts, but worth
       about 4 shillings sterling, or about 96 cents; also, a
       gold coin worth about the same.
   (b) A gold coin of Rome, worth 64 shillings 11 pence
       sterling, or about $ 15.70.
       [1913 Webster]