Tropus, tropi, m. gen. Dici potest modus, figura, conuersio. Quint. A figure: a mancr or fashion.
Lewis and Short: Latin dictionary
trŏpus, i, m., = tro/pos. I. In rhet., a figurative use of a word, a trope (postAug. for translatio, verborum immutatio), Quint. 9, 1, 4 sq.; 9, 2, 44 sq.; 9, 3, 20 al.— II.A manner of singing, a song, Ven. Carm. 10, 10, 54; 10, 10, 60; 10, 12, 4.