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Is there a way to get the name of the physical quantity given by a particular unit? For example, QuantityUnit[Quantity[1, "Henries"]] returns "Henries", but I want to know what "Henries" are a measure of. That is, "electrical inductance". Will Mathematica provide that kind of information?

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    $\begingroup$ You must be wrong. "Henries" has nothing to do with inductance. Try WolframAlpha["Quantity Henries"]. The correct answer is obviously "342037 people" :) $\endgroup$ – halirutan Feb 3 '18 at 8:02
  • $\begingroup$ The problem could be also that several physical quantities can be measured in Henries (H). As noted, use W|A... $\endgroup$ – José Antonio Díaz Navas Feb 3 '18 at 12:54
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I'm not sure there isn't a way to do this without W|A but this gives what you are after:

WolframAlpha[#, {{"PhysicalQuantity", 1}, 
    "ComputableData"}] & /@ {"Henries", "Meters", "Volts"}
(* {"magnetic inductance", "length", "electric potential difference"} *)
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