Meaning

noun an instrument showing the angle that an aircraft makes with the horizon

noun a measuring instrument for measuring the angle of magnetic dip (as from an airplane)

noun an instrument used by surveyors in order to measure an angle of inclination or elevation

originEtymology tree Latin inclīnāre Old French enclinerbor. Middle English enclinen English incline Ancient Greek -ο- (-o-)der. Latin -o-bor. English -o- Proto-Indo-European *meh₁- Proto-Indo-European *-trom Proto-Hellenic *-tron Ancient Greek -τρον (-tron) Ancient Greek μέτρον (métron)der. English -meter English inclinometer From incline + -o- + -meter.

Etymology from Wiktionary, CC BY-SA 3.0