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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Science / Chemistry / Indicator: A substance that undergoes an sharp, easily observable change when conditions in its solutions change. See, for example, acid-base indicator and redox indicator. 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
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
Life Style / Wine / Redox: A term describing the reductive-oxidative way that wine ages. As one part gains oxygen and becomes oxidized, another part loses oxygen and becomes reduced. Early in its life, a wine will exhibit oxida 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