Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
spīcĕus, a, um, adj. [spica], consisting of ears of corn (poet. and in post-Aug. prose): corona, Tib. 1, 1, 16 (24); Hor. C. S. 30; Plin. 18, 2, 2, § 6; Sabin. Massur. ap. Gell. 6, 7, 8; cf. serta, Tib. 1, 10, 22; Ov. M. 2, 28; 10, 433; id. Am. 3, 10, 36; Claud. B. Gild. 136: messis, i. e. of grain, Verg. G. 1, 314: frux, Aus. Monos. de Cibis: coma, i. e. the ears, Prop. 4 (5), 2, 14.