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Hint: Question mark (?) is a wildcard. Question mark substitutes one character.
English
noun
:
perchloric acid
1.
perchloric acid
(substance)
a powerful oxidizing agent; forms perchlorates
Broader (hypernym)
acid
Based on WordNet 3.0 copyright © Princeton University.
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Orcapia v/Per Bang
. English edition:
Peter Jensen
.
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