Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fulmĭnātus, a, um, adj. [fulmino], provided with thunder-bolts, bearing thunder: legio XII. fulminata, probably because their shields bore the device of Jupiter brandishing the thunder-bolt, Inscr. Orell. 517; 3174; Inscr. Murat. 869, 1; cf.: κεραυνοφόρον στρατόπεδον, Dio. Cass. 55, 23.