Lewis & Short

ab-sĭmĭlis, e, adj. [ab, priv.], unlike, usually with a neg. and dat.

        1. (α) Absol.: falces non absimili formā muralium falcium, Caes. B. G. 3, 14, 5.
        2. (β) With dat.: (herba) neque absimilis bitumini, Col. 6, 17, 2; so Plin. 8, 33, 51, § 121; Suet. Oth. 1; id. Dom. 10 al.