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1. Oxford American Dictionary

   indicator

   • IPA[ˈindəˌkādər]

   美式

   • n.
     a thing, especially a trend or fact, that indicates the state or level of something；an animal or plant species that can be used to infer conditions in a particular habitat

   • noun: indicator, plural noun: indicators

2. • 釋義

   n.

   名詞

   • 1. a thing, especially a trend or fact, that indicates the state or level of something car ownership is frequently used as an indicator of affluence 同義詞 measure, gauge, barometer, index, mark, ... 更多sign, signal, guide to, standard, touchstone, yardstick, benchmark, criterion, point of reference, guideline, test, litmus test
   • ▪ an animal or plant species that can be used to infer conditions in a particular habitat the raccoon is a poor choice as an indicator of riparian habitat
   • 2. a gauge or meter of a specified kind a speed indicator 同義詞 meter, measuring instrument, measuring device, measure, gauge, ... 更多dial, display, scale, index
   • ▪ British a flashing light or (formerly) other device on a vehicle to show that it is about to change lanes or turn; a turn signal an indicator light
   • 3. a compound that changes color at a specific pH value or in the presence of a particular substance, and can be used to monitor acidity, alkalinity, or the progress of a reaction the remaining alkali is titrated against standard acid using phenolphthalein as indicator