the world > the earth > weather and the atmosphere > weather > study or science of weather > meteorological instruments > [noun] > instruments for studying clouds
nephelodometer1857
nephelorometer1875
nephoscope1880
nephelometer1884
1875 E. H. KnightAmer. Mech. Dict. II. 1521/2Nephelorometer, an instrument for ascertaining the speed and direction of motion of the clouds.