Balneum is a genus of bush cricket in family Tettigoniidae subfamily Phaneropterinae. ...
This term was used to refer to a small city bath house of the type found at Pompeii. as opposed to the larger thermae, however, it was also used to distinguish private from public bath houses, or bath houses with sections for women from bath houses for men only. Also used for a large round bath found in a frigidarium. 
balneum A small Roman bathhouse that may be attached to a private house.