Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
nūtrītor, ōris, m. [nutrio], a bringer up, rearer, breeder (post-Aug.): volucrum equorum, Stat. Th. 10, 228: Alexandri Severi, Lampr. Alex. Sev. 13: a nutritore suo manumissus, Suet. Gram. 7; Inscr. Orell. 2816.