heliometer

/ˈhiliˌɑmədər/
IPA guide

Other forms: heliometers

Definitions of heliometer
  1. noun
    an instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope
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    type of:
    measuring device, measuring instrument, measuring system
    instrument that shows the extent or amount or quantity or degree of something
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