Trochus, trochi, m. g. Mart. Horat. A toppe whcrewith children play.Argutus trochus. Martial. Celer. Martial.
Lewis and Short: Latin dictionary
trŏchus, i, m., = troxo/s, an iron hoop set round with small rings, a trundling-hoop for children, Hor. C. 3, 24, 57; id. A. P. 380; Prop. 3, 14 (4, 13), 6; Ov. A. A. 3, 383; id. Tr. 2, 486; Mart. 14, 168, 2; 14, 169, 2 al.