Lewis & Short

frīgĭdārĭus, a, um, adj. [frigidus],

  1. I. of or for cooling: ahenum, i. e. to hold cold water, Vitr. 5, 10: cella balinei, the coolingroom, Plin. Ep. 2, 17, 11; 5, 6, 25 sq.: maltha, Pall. 1, 41: fistula, id. 1, 40: cisterna, Petr. 73.
  2. II. Subst.: frīgĭdārium, ii, n.
    1. A. The cooling-room in a bath, Vitr. 5, 11.
    2. B. In a contr. form: frigdāria, ōrum, a cold larder, provision-room: mercem in frigdaria ferre, Lucil. ap. Prisc. p. 909 P.