Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prōtectum, i, n. [protego, I. B.], the projecting part of a roof, the eaves (postAug.), Dig. 9, 2, 29; 47, 7, 6; 43, 25, 15; Inscr. Maff. Mus. Veron. 448, 2: vinearum, Plin. 17, 12, 18, § 89.