Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
fitilla or fritilla, ae, f., a gruel used at sacrifices, Sen. Ben. 1, 6, 3 Fickert N. cr.; Plin. 18, 8, 19, § 84; Arn. 2, 58; 7, 230.