Also 7–8 tetrobolon, -um, 9 -us. [ad. mod.L. tetrobol-um, a. Gr. τετρώβολον a four-obolus piece, f. τετρα- four + ὀβολός OBOLUS.] A silver coin of ancient Greece of the value of four oboli.
1693. trans. Blancard’s Phys. Dict. (ed. 2), Tetrobolon, four Drams.
1706. Phillips (ed. Kersey), Tetrobolum, a Coin of four Oboli, about four Pence half-penny of our Money.
1842. Smith’s Dict. Grk. & R. Antiq., s.v. Drachma, Specimens of the tetrobolus, triobolus, diobolus, three-quarter-obol, half-obol,… are still found.
1895. Athenæum, 23 Nov., 723/1. An Æginetic hemi-drachm of about 40 grains … was equivalent to the Corinthian drachm or Attic tetrobol.
