Science / Chemistry / Redox Indicator: An organic molecule that has reduced and oxidized forms with different colors; interconversion of the reduced and oxidized forms of the indicator must be reversible. Ferroin is an example.
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Indicator Noun Synonyms: pointer, needle, gauge, meter, display
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Technology / Radar / Plan Position Indicator (PPI): The face or screen of a cathode-ray tube on which radar images appear in correct relation to each other, so that the scope face presents a chart like representation of the area about the antenna, the MORE
Technology / Radar / Radar Indicator: A unit of a radar set which provides a visual indication of radar echoes received, using a cathode-ray tube for such indication. Besides the cathode-ray tube, the radar indicator is comprised of sweep MORE
Technology / Radar / Range Height Indicator (RHI): A range height indicator (rhi) is a radar display that represents the height of the target on the vertical axis, and uses the horizontal axis of the rhi to represent the target range. MORE
Science / Weather / Plan Position Indicator: Also known as a PPI Scope, it is a radar indicator scope displaying range and azimuth of targets in polar coordinates. MORE
Entertainment / Bowling / Pindicator: A display board that shows the bowler which pins remain standing after the first ball. MORE
Business / Human Resources (HR) / Myers-Briggs Type Indicator: A psychological test used to assess an individual’s personality type. MORE