lunar caustic

noun Medicine/Medical, Chemistry.

silver nitrate, AgNO3, especially in a sticklike mold, used to cauterize tissues.

Origin of lunar caustic

First recorded in 1790–1800

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British Dictionary definitions for lunar caustic

lunar caustic

noun

silver nitrate fused into sticks, which were formerly used in cauterizing

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012