Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† thȳmĭāma, ătis, n., = θυμίαμα, a composition for fumigating, incense, Cels. 5, 18, 7 sq.; 6, 6, 25; Vulg. Exod. 25, 6.