Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
ā̆prīnus, a, um, adj. [aper], of or belonging to the wild boar: viscus, Lucil. ap. Charis. p. 63 P.: pulmo, Plin. 28, 16, 62, § 222: vesica, id. 28, 15, 60, § 215: fel, id. 28, 16, 62, § 221.
As a secondary form, Hyg. Fab. 69, has twice ā̆prīnĕus, a, um, if the reading is correct.