Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
bōlētārĭa, ĭum (post-class. in sing.: bōlētar, Apic. 2, 1; 5, 2; 8, 7; Treb. Claud. 17; cf. altaria), n. [boletus], a vessel for mushrooms, Mart. 14, 101 lemm.