ustulation

noun

us·​tu·​la·​tion

ˌəs(h)chəˈlāshən

plural -s

1

: the action of burning or searing

2

: an operation formerly used in chemistry of expelling one substance from another (as sulfur from an ore) by heat in a muffle

Word History

Etymology

Medieval Latin ustulation-, ustulatio, from Latin ustulatus (past participle of ustulare to burn slightly, scorch, from assumed Latin ustulus slightly burned, from Latin ustus, past participle of urere to burn) + -ion-, -io -ion

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