as·say 
/æˈseɪ/ verb
as·says; as·sayed; as·say·ing /æˈseɪ/ verb [+ obj] technical : to test something (such as a metal or drug) to find out what it contains
▪ They assayed the gold to determine its purity.
▪ They assayed the gold to determine its purity.
— as·say /ˈæˌseɪ/ noun, plural as·says [count]
▪ a gold assay
/ˈæˌseɪ/ noun, plural as·says [count] ▪ a gold assay
