Obsianus Save Lewis & Short Georges Gaffiot 2016 Obsĭānus, a, um, v. Obsius. Obsiānus, a, um, s. Obsius. Obsĭānus, a, um, dʼObsius : lapis Plin. 36, 157, pierre dʼObsius || Obsĭāna, ōrum, n. , Plin. 36, 196, vases dʼObsius.