"(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction"@en-us . "114068724"@en-us . "indicator"@en-us . . "0"^^ . "114917208"^^ . "14917208-n"^^ . . "indicator"^^ . "(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction"@en-us . . . . "0"^^ . . . .