Lewis & Short

cētārĭus, a, um, adj. [cetus], of or pertaining to fish; only subst.

  1. I. cētārĭus, ii, m., a fish-monger, Ter. Eun. 2, 2, 26 (also in Cic. Off. 1, 42, 150); Varr. ap. Non. p. 49, 15; Col. 8, 17, 12.
    Cētārĭus, title of a book of C. Matius, Col. 12, 46, 1.
  2. II. cētā-rĭum, ii, n., a fish-pond, Hor. S. 2, 5, 44.
    Access. form cētārĭa, ae, f.; acc. plur. cetarias, Plin. 9, 15, 19, § 49; 37, 5, 17, § 66; an uncertain form, abl. plur. cetariis, Plin. 9, 30, 48, § 91; 31, 8, 43, § 94.