s 1 o 1 n 1 a 1 r 1
5 letters · 5 points in Scrabble
Meaning
noun a measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return
originAcronym of sound navigation and ranging. Coined by American scientist Frederick Vinton Hunt in the 1940s, roughly contemporaneously with radar. The lowercase form (sonar) is by anacronymic evolution.
Etymology from Wiktionary, CC BY-SA 3.0