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.

sexprīmi (also separately, sex prī-mi; cf. decem primi, under decem), ōrum, m. [sex-primus], a board or college of magistrates in provincial towns, consisting of six members, Cic. N. D. 3, 30, 74; Inscr. Orell. 3756.
In sing., a member of such a board, Inscr. Orell. 3242.