ometer

Noun

1. A measuring instrument.
   • On the wall were hanging thermometers, barometers, and hydrometers, and every other sort of ometer, numberless, dusty, and mysterious; […] - 1843, John Holmes Agnew, Eclectic Museum of Foreign Literature, Science and...
   • Oh, that some one would invent an ometer which, hung over the heart and lungs, might decide when a man ought to stop brain work. The man who invented such an ometer would make a fortune for himself […] - 1887, N. A....
   • We have thermometers to tell the heat and barometers to tell the air and 'ometers hung in the engine-room to tell the pressure of steam, and 'ometers to gauge and measure almost everything. - 1900, Orations of American...