Branch of physics dealing with sound and its waves (plural noun)
Looking for the answer to the USA Today Rootonym clue “Branch of physics dealing with sound and its waves (plural noun)”? The solution is ACOUSTICS, a 9-letter word built on the root ACOU (“hearing”). It appeared in the August 30, 2026 (Sunday) USA Today Rootonym. See the full puzzle for that day's other words.
Answer
ACOUSTICS
ACOU*****ACOUmeans “hearing”
In a sentence
Many universities provide sound rooms with superior ACOUSTICS for their music departments.
About this clue
The Rootonym clue “Branch of physics dealing with sound and its waves (plural noun)” has the answer ACOUSTICS (9 letters), built on the root ACOU, which means “hearing”. Browse the full August 30, 2026 Rootonym puzzle for the other three words, or see all Rootonym answers.