Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
cănīcŭlāris, e, adj. [canicula, II. A.], of or pertaining to the dog-star (post-class.): dies, dog-days, Pall. Jul. 1 and 7; Sol. Veg. 5, 35: inclementia, Sid. Ep. 2, 2.