I.of or belonging to burden, transport, or carriage; that bears a burden, carries freight (class.): “jumenta,” beasts of burden, Liv. 41, 4: navis, a ship of burden, Sisenn. ap. Non. 536, 5 (opp. actuaria); Caes. B. G. 4, 22; 25 al.; Liv. 22, 11, 6.—Also subst.: ŏnĕrārĭa , ae, f., a ship of burden, a merchant-vessel, a transport, Cic. Att. 10, 12, 2.
ŏnĕrārĭus , a, um, adj. onus,