Lewis Short
balnĕŏlum | balnĕŏlae, ārum (noun N.f) : n. (plur. , , f.), dim. balneum
* A small bath: balneolum angustum, tenebricosum,Sen. Ep. 86, 4; Juv. 7, 4: primus balneolas suspendit,Cic. Hortens. Fragm. 69 B. and K. (ap. Non. p. 194, 13); Aug. contra Ac. 3, 4.
Charlton T. Lewis, Charles Short, A Latin Dictionary