n.
Pronunciation: ˌ b ī -( ˌ ) ō - ə - ' kü-stiks
Function: noun plural but singular in construction
Date: 1957
: a branch of science concerned with the production of sound by and its effects on living organisms
– bio · ac · ous · ti · cian \ - ˌ a- ˌ kü- ' sti-sh ə n, - ə - ˌ kü- \ noun