SUBSONIC
Scrabble letter values: S1U1B3S1O1N1I1C3 = 12
Definition
- adjective (of speed) less than that of sound in a designated medium.
Examples
- “aircraft flying at subsonic speeds”
- “The noise of the ship was all around her. The faint subsonic rumble of the reactor and drive. (Leviathan Wakes, James S. A. Corey)”