Function: noun
Date: 1731
: a sac containing gas and especially air especially : a hydrostatic organ present in most fishes that serves as an accessory respiratory organ
A air bladder
Function: noun
Date: 1731
: a sac containing gas and especially air especially : a hydrostatic organ present in most fishes that serves as an accessory respiratory organ
A air bladder
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012