Lewis & Short

Cĕrĕālis (Cĕrĭālis; cf. Serv.ad Verg. A. 1, 177; so Cic. Att. 2, 12, 2 and 4 Orell.), e, adj. [Ceres].

  1. I. Pertaining to Ceres, devoted to her, and, meton., pertaining to the cultivation of land, grain, or agriculture: nemus, sacred to Ceres, Ov. M. 8, 741: sacrum, id. Am. 3, 10, 1: Eleusin, id. F. 4, 507; id. M. 7, 439 (cf. Mel. 2, 3, 4: Eleusin Cereri consecrata): papaver (as her symbolic attribute), Verg. G. 1, 212 Heyne; Col. 10, 314: cenae, i. e. splendid, like those at the festivals of Ceres, Plaut. Men. 1, 1, 25: sulci, Ov. Tr. 3, 12, 11: munera, id. M. 11, 121; 13, 639: dona, id. ib. 11, 122; id. F. 1, 683; 6, 391 (cf.: dona Cereris, id. M. 5, 655): herbae, id. F. 4, 911: libum, id. ib. 1, 127: semina, id. M. 1, 123: culmus, Verg. G. 2, 517: arma, i. e. the implements for grinding and baking, id. A. 1, 177: solum, i. e. the cake laid on the ground, id. ib. 7, 111 (cf. id. ib. v. 109): aediles, who had the superintendence of provisions; v. aedilis fin.
    Hence,
    1. B. Subst.: Cĕrĕālĭa, ium, n. (also in appos.: Cerealia ludi, Liv. 30, 39, 8; cf.: Megalesia ludi, al.), the festival of Ceres, celebrated on the 10th of April, Cic. Att. 2, 12, 2 and 4; Varr. L. L. 6, § 15 Müll.; Ov. F. 4, 619; cf. id. ib. 389 sq.
  2. II. A Roman cognomen, Mart. 4, 8; 12, 52.