Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
hĭrundĭnīnus, a, um, adj. [hirundo], of or belonging to swallows, swallows’ (class.): sanguis, fel, Plin. 30, 14, 46, § 133: nidus, Plaut. Rud. 3, 1, 6; Mart. 11, 18, 20.