ben·zim·id·az·ole 
(bĕn′zə-mĭ-dăzōl′, -mĭdə-zōl′)
(bĕn′zə-mĭ-dăzōl′, -mĭdə-zōl′)n.
1. A heterocyclic compound, C7H6N2, that is used in organic synthesis and inhibits the growth of certain fungi.
2. Any of various derivatives of this compound, such as thiabendazole, used especially as anthelmintic and antifungal agents.