to remove the chlorine from (a substance, as water)
to dechlorinate tap water for use in an aquarium
Derived forms
dechlorination
noun
Word origin
[1940–45; de- + chlorinate]This word is first recorded in the period 1940–45. Other words that entered Englishat around the same time include: black box, sealant, update, whiteout, zapde- is a prefix occurring in loanwords from Latin (decide); also used to indicate privation, removal, and separation (dehumidify), negation (demerit; derange), descent (degrade; deduce), reversal (detract), or intensity (decompound)