indicator
UK: ˈɪn.dɪ.keɪ.tər | US: ˈɪn.dɪ.keɪ.t̬ɚ
n. a device or substance that shows the presence or state of something
n. a sign or signal that provides information
n. (economics) a statistical measure used to assess economic performance
The word "indicator" originates from Latin indicāre ("to point out, declare"), combining in- (toward) and dicare (to proclaim). The root dic- (from dicare) evolved into English words like "dictate" and "predict." The suffix -ator denotes an agent or tool, forming nouns (e.g., "navigator," "elevator"). Thus, an "indicator" literally means "something that points out or declares."
The thermometer acts as an indicator of room temperature.
Economic indicators suggest a slowdown in growth.
The car’s turn indicator flashed before it changed lanes.
Her facial expressions are a reliable indicator of her mood.
Scientists use pH indicators to measure acidity levels.