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.

Trossŭli, ōrum, m., a name given to the Roman cavalry, from Trossulum, a town of Etruria, which was conquered by them, Varr. ap. Non. 49, 3; cf.: Junius Gracchanus in Plin. 33, 2, 9, § 36; Fest. p. 367 Müll.
In sing., Pers. 1, 82 Schol.
In the Aug. per., a name used in contempt for fops, coxcombs, Sen. Ep. 87, 9; so id. ib. 76, 2.