cathodic

[ka-thod-ik, -thoh-dik, kuh-]
adjective
pertaining to a cathode or phenomena in its vicinity.
Also, cathodal [kath-uh-dl] .


Origin:
1830–40; cathode + -ic

cathodically, cathodally, adverb
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World English Dictionary
cathode (ˈkæθəʊd)
 
n
1.  the negative electrode in an electrolytic cell; the electrode by which electrons enter a device from an external circuit
2.  the negatively charged electron source in an electronic valve
3.  the positive terminal of a primary cell
 
[C19: from Greek kathodos a descent, from kata- down + hodos way]
 
cathodal
 
adj
 
cathodic
 
adj
 
ca'thodical
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

cathodic
1837, from cathode (q.v.).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
In the absence of cathodic protection, however, corrosion sets in when coatings
  break down.
These procedures should include design, installation, operation and maintenance
  activities on a cathodic protection system.
Cathodic protection upgrade shall be performed under the direct supervision and
  instruction of a corrosion expert.
The second common type of cathodic protection is referred to as impressed
  current cathodic protection.
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