subsonic
(adjective) (of speed) less than that of sound in a designated medium; “aircraft flying at subsonic speeds”
Source: WordNet® 3.1
subsonic (not comparable)
(of a sound, scientific) having a frequency too low to be audible
(of a sound, literary) very quiet, almost inaudible
(of a speed) (aviation) less than the speed of sound (in the same medium, and at the same temperature and pressure)
(fluid mechanics, of a flow) with a Mach number such that 0.3 < Ma < 0.8 (approximately - the exact limits vary between sources)
subsonic (plural subsonics)
an aircraft whose maximum speed is less than the speed of sound
Source: Wiktionary
29 June 2024
(noun) an abbreviation formed from the initial letters of the several words in the name and pronounced separately; “HTML is an initialism for HyperText Markup Language”
Espresso is both a coffee beverage and a brewing method that originated in Italy. When making an espresso, a small amount of nearly boiling water under pressure forces through finely-ground coffee beans. It has more caffeine per unit volume than most coffee beverages. Its smaller serving size will take three shots to equal a mug of standard brewed coffee.
