ἐπιτόνιον

A. peg or key by which the strings of an instrument are tuned, ἐ. ψαλτηρίου (‐ήριον cod.) prob. in Ath. 10.456d : metaph., ἡ συντροφία ὥσπερ ἐ. ἐστι τῆς εὐνοίας Plu. 2.3d.

2. pitch-pipe for giving the note to a choir, Et.Gud.d. s.v. ἀπότομον.

II. any peg shaped like ἐ. I. Orib. 49.4.26, al.; handle of a tap, turn-cock, Hero Aut. 13.5, VarroRR 3.5.16, Vitr. 9.8.11, Ulp. ap. Dig.19.1.17.8 ; handle of a syringe, Hero Spir. 2.18.

2. valve or stop in an organ-pipe, Vitr. 10.8.5.

3. pl., sockets in which a roller was set, Bito 49.10.