τετρᾰ́-χορδος,ον, (χορδή)
A. four-stringed, ὄργανον
Ath. 4.183a
; λύρα
Str. 13.2.4
.
II. Subst. -χορδον,τό ,tetrachord, i.e.scale of four notes, comprising two tones and a half, Arist. Pr. 922b8 , Fr. 47 , Plu. 2.1021e , etc.: metaph., (sc.παθῶν) Aristo Stoic. 1.85 , cf. Jul. Caes. 315c .