Source : Webster's Revised Unabridged Dictionary (1913)

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

Source : WordNet®

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