tē̆trăchordos, on, adj., = τετράχορδος, ον, having four strings or notes.
I Adj. : machina, a water-organ , Vitr. 10, 13. —
II Subst. tē̆trăchordon ( -dum ), i, n., a chord of four notes , a tetrachord.
A Lit., Vitr. 5, 4; Mart. Cap. 9, §§ 935 and 941; Macr. S. 1, 19 med. —
B Trop.: anni, i. e. the four seasons , Varr ap. Non. 71, 16.