de chlorination

de·chlo·ri·nate

[dee-klawr-uh-neyt, -klohr-]
verb (used with object), de·chlo·ri·nat·ed, de·chlo·ri·nat·ing. Chemistry.
to remove the chlorine from (a substance, as water): to dechlorinate tap water for use in an aquarium.

Origin:
1940–45; de- + chlorinate

de·chlo·ri·na·tion, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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WordNet
dechlorinate

verb
remove chlorine from (water) 
WordNet® 3.0, © 2006 by Princeton University.
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00:10
De chlorination is always a great word to know.
So is quincunx. Does it mean:
a chattering or flighty, light-headed person.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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