Chemistry. an anode that is attached to a metal object subject to electrolysis and is decomposed instead of the object.
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“Compliment” and “complement” had a shared meaning a long time ago, but today they are no longer interchangeable.
Origin of sacrificial anode
First recorded in 1975–80
Words nearby sacrificial anode
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for sacrificial anode
metallurgy an electropositive metal, such as zinc, that protects a more important electronegative part by corroding when attacked by electrolytic action
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