The Collaborative International Dictionary
Catacoustic
Catacoustic \Cat`a*cous"tic\, n. [Pref. cata + acoustics: cf. F.
caraconstique.] (Physics)
That part of acoustics which treats of reflected sounds or
echoes See Acoustics.
--Hutton.
Wiktionary
catacoustic
a. Of or relating to catacoustics.