Etymology
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cautery (n.)

1540s, "heated metal used for burning or searing animal tissue," from Latin cauterium "branding iron," from Greek kauterion, from kauteriazein (see cauterize). From 1570s as "a burning or searing" (by a hot iron or caustic substance).

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Definitions of cautery

cautery (n.)
an instrument or substance used to destroy tissue for medical reasons (eg removal of a wart) by burning it with a hot iron or an electric current or a caustic or by freezing it;
Synonyms: cauterant
cautery (n.)
the act of coagulating blood and destroying tissue with a hot iron or caustic agent or by freezing;
Synonyms: cauterization / cauterisation
From wordnet.princeton.edu