Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
hornus, a, um, adj. [contr. for hōrinus = ὥρινος from ὥρα], of this year, this year’s (not in Cic.; but cf. hornotinus): agni, Prop. 4, (5), 3, 61: fruge, Hor. C. 3, 23, 3: vina, id. Epod. 2, 47: palea, id. S. 2, 6, 88.
Adv.: horno, this year: utrum anno an horno te abstuleris a viro? Lucil. ap. Non. 121, 8: horno messis magna fuit, Plaut. Most. 1, 3, 3; Varr. ap. Non. 121, 10.