ancient silver money of Athens, the fifth part of a drachma; worth somewhat more than a penny-farththing farthing.—The word comes from the Greek ὀβολός, or ὀβάλης, "spit, or broach;" either because it bore such an impression; or because, according to Eustathius, it was in form thereof. But those now in the cabinets of the antiquaries are round.

Medicine, is used for a weight of ten grains, or half a scruple.