Language: en
Meaning: (idiomatic)Something whosesensitivitytoadverseconditions makes it a useful earlyindicatorof such conditions; something which warns of the coming of a greater danger or trouble by adeteriorationin its health or welfare.2003April, “Saving the St. Joe”, inField & Stream:"A mussel is acanary in a coal mine," Clemens explained. "When the freshwater mussels are healthy, it indicates good water quality."2008, Jean Haner,The Wisdom of Your Face: Change Your Life With Chinese Face Reading!, Hay House, published2008,→ISBN,page133:On the job, she was like acanary in a coal mine: If the subtle energy wasn't in balance, she was the first to notice.2009April, Steve Kandell, “What Makes U2 Run?”, inSpin:Thanks to rampant real estate development that revitalized the city starting in the '90s, Dublin has been something of acanary in a coal minewith regard to the global financial meltdown — the credit crunch hit here early and hard.
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