obolus

noun

1. A silver coin minted in Ancient Greece, valued at a sixth of a drachma.
2. (historical)A unit of weight, equal to one-sixth of a drachma.

   “Dav. […] And after that I met the boy of Chremes With fishes, and an obolus of herbs.”

3. (alt-of, alternative)Alternative form of obelus.

   “The Globe editors have marked it with the obolus according to their explanation in the preface: "Whenever a lacuna occurs too great to be filled out with any approach to certainty by conjecture, we have marked the passage with an obolus (†)".”