O / ŏbĕlus
noun greek

ŏbĕlus

gen. ŏbĕli · gender masculine · decl. 2nd
= ὀβελός (a spit)
a critical mark; an obelisk
a critical mark shaped like a spit (†), placed opposite suspected passages in books, an obelisk (late Lat.), Hier. Ep. 104; 108; 112; Aus. Sap. 13 prooem.; Isid. Orig. 1, 20, 2.