acid kiln ( synonym found)
Definition of acid kiln:

(adj) : having a pH less than 7, or being sour, or having the strength to neutralize alkalis, or turning a litmus paper red; containing a high percentage of silica; -- opposed to basic
"an acidic solution"
Definition of acid kiln:

(adj) : having a pH less than 7, or being sour, or having the strength to neutralize alkalis, or turning a litmus paper red; containing a high percentage of silica; -- opposed to basic
"an acidic solution"
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