The Collaborative International Dictionary of English v.0.48:

Guilder \Guil"der\, n. [D. gulden, orig., golden. Cf. Golden.]
   A Dutch silver coin worth about forty cents; -- called also
   florin and gulden.
   [1913 Webster]

WordNet (r) 3.0 (2006):

guilder
    n 1: the basic unit of money in Suriname; equal to 100 cents
         [syn: guilder, gulden, florin]
    2: formerly the basic unit of money in the Netherlands; equal to
       100 cents [syn: guilder, gulden, florin, Dutch
       florin]