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indicator

英 ['ɪndɪkeɪtə]美['ɪndɪketɚ]
  • n. 指示器;[试剂] 指示剂;[计] 指示符;压力计

英英释意


1. a number or ratio (a value on a scale of measurement) derived from a series of observed facts; can reveal relative changes as a function of time
2. a signal for attracting attention
3. a device for showing the operating condition of some system
4. (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
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