Lewis & Short

tĕpĭdārĭus, a, um, adj. [tepidus], of or belonging to tepid water or to a tepid bath.

  1. I. Adj.: aënum, Vitr. 5, 10: CELLA, Inscr. Orell. 3328.
  2. II. Subst.: tĕpĭdārĭum, ii, n., a tepid bathing-room, tepid bath, Cels. 1, 3; Vitr. 5, 10, §§ 1 and 5.