Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

thĕōrēma, ătis, n., = θεώρημα, a proposition to be proved, a theorem, Gell. 17, 19, 3; Mart. Cap. 3, § 230.
Dat. plur. theorematis, Gell. 1, 2, 6.