<chemical> An effective weed killer that also possesses some antithyroid activity. ... Chemical name: 3-amino-1H-1,2,4-triazole ... Synonym: amitrole. ... (14 Aug 2000) ... 
Type: Term Pronunciation: ă-mē′nō-trī′ă-zōl Definitions: 1. An effective weed killer that also possesses some antithyroid activity.