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4
6*
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'corrosive substance' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for acid that I've seen before
include
"Corrosive fluid"
,
"Corrosive substance"
,
"See 4 Across"
,
"Substance with pH of less than 7"
,
"Bitter; biting"
.)
I've seen this clue in The Times, The Star Tribune, The Mirror, the USA Today, the Universal and the Evening Standard.
(Other definitions for lime that I've seen before
include
"Round green fruit or a linden tree"
,
"Hang about in Jamaica"
,
"White substance used in cement"
,
"Greene character?"
,
"Sharp-tasting fruit"
.)
I've seen this clue in The Times, The Star Tribune, The Mirror, the USA Today, the Universal and the Evening Standard.
I've seen this clue in The Times, The Star Tribune, The Mirror, the USA Today, the Universal and the Evening Standard.
(Other definitions for alkali that I've seen before
include
"Compound like lime"
,
"Substance turning litmus paper blue"
,
"In pH terms, not acid"
,
"Chemical base"
,
"Opposite of acid"
.)
I've seen this clue in The New York Times.
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