LSJ
ὁ, = ζῦθος, PCair. Zen. 176.4 (iii BC), al., PPetr. 3 p. 327 (iii BC), UPZ 149.14 (iii/ii BC), PMagPar. 1.908, OGI 200.16 (Axum, iv AD); — also ζῦτος, εος, τό, PHib. 1.113.6 (iii BC), Glauc. ap. POxy. 1802.42.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)