son ‧ ic /ˈsɒnɪk $ ˈsɑː-/ BrE AmE adjective [only before noun] technical
[ Date: 1900-2000 ; Language: Latin ; Origin: sonus ; ⇨ ↑ sound 1 ]
relating to sound, ↑ sound wave s , or the speed of sound
son ‧ ic /ˈsɒnɪk $ ˈsɑː-/ BrE AmE adjective [only before noun] technical
[ Date: 1900-2000 ; Language: Latin ; Origin: sonus ; ⇨ ↑ sound 1 ]
relating to sound, ↑ sound wave s , or the speed of sound
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012