lunar caustic

lunar caustic

noun Medicine/Medical, Chemistry.
silver nitrate, AgNO3, especially in a sticklike mold, used to cauterize tissues.

Origin:
1790–1800
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Lunar caustic is always a great word to know.
So is umbilicus. Does it mean:
any of the bones of the wrist.
the depression in the center of the surface of the abdomen indicating the point of attachment of the umbilical cord to the embryo; navel.
Collins
World English Dictionary
lunar caustic
 
n
silver nitrate fused into sticks, which were formerly used in cauterizing

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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