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indicator |
Also found in: Dictionary/thesaurus, Medical, Financial, Acronyms, Wikipedia, Hutchinson | 0.06 sec. |
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indicator 1. a device to attract attention, such as the pointer of a gauge or a warning lamp 2. an instrument that displays certain operating conditions in a machine, such as a gauge showing temperature, speed, pressure, etc. 3. a device for indicating that a motor vehicle is about to turn left or right, esp two pairs of lights that flash when operated or a pair of trafficators 4. a delicate measuring instrument used to determine small differences in the height of mechanical components. It consists of a spring-loaded plunger that operates a pointer moving over a circular scale 5. Chem a. a substance used in titrations to indicate the completion of a chemical reaction, usually by a change of colour b. a substance, such as litmus, that indicates the presence of an acid or alkali 6. Ecology a. a plant or animal species that thrives only under particular environmental conditions and therefore indicates these conditions where it is found b. a species of plant or animal whose well-being confirms the well-being of other species in the area How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The latter had an ivory plate bearing "statoscope" and other words in French, and a little indicator quivered and waggled, between Montee and Descente. The grouped letters stood out heavily black, around the pivot-head of the indicator, emphatically symbolic of loud exclamations: AHEAD, ASTERN, SLOW, Half, STAND BY; and the fat black hand pointed downwards to the word FULL, which, thus singled out, captured the eye as a sharp cry secures attention. Now, instead of reversing the levers, I had pulled them over so as to go forward with them, and when I came to look at these indicators I found that the thousands hand was sweeping round as fast as the seconds hand of a watch--into futurity. |
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