ŏbŏlus

i, m.
I. Lit., an obol, a small Greek coin, the sixth part of a drachm, equivalent to three and a half cents Federal currency, Vitr. 3, 1: siclus viginti obolos habet, Vulg. Exod. 30, 13.—
II. Transf., as a weight, the sixth part of a drachm Fann. de Ponder. et Mens. 37; cf. Cels. 5, 17; Plin. 21, 34, 109, § 185; 25, 12, 91, § 142: trium obolorum pondere, id. 21, 25, 96, § 169.
Lewis & Short
A Latin Dictionary, 1879
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