rate-of-climb indicator

[ reyt-uh v-klahym ]
/ ˈreɪt əvˈklaɪm /

noun Aeronautics.

a flight instrument that indicates the rate of climb or descent of an aircraft.

Origin of rate-of-climb indicator

First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019