The Collaborative International Dictionary of English v.0.48:

Fungicide \Fun"gi*cide`\, n. [Fungi + -cide, fr. L. caedere to
   kill.]
   Anything that kills fungi. -- Fun`gi*ci"dal, n.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fungicide
    n 1: any agent that destroys or prevents the growth of fungi
         [syn: antifungal, antifungal agent, fungicide,
         antimycotic, antimycotic agent]