GRC
Bailly
πλακοῦς, v. πλακόεις.
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LSJ
οῦντος, ὁ, voc. πλακοῦ Theodos. Can. p. 3 H. ; — contr. from πλακόεις, flat cake (perh.
shaped like the mallow-seed, Phan. Hist. 29), freq. in Com., πλακοῦντος κύκλος Ar. Ach. 1125, cf. Alex. 22 (pl., hex.); π. ἄρτος Ath. 14.645d; also resolved πλακόεις, AP 6.155 (Theodorid.).
the seed of the mallow, which seeds children call cheeses, Phan. Hist. 29, Gal. 10.113.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
οῦντος, ὁ, zsgzn aus πλακόεις, vgl. Ath. XIV.644, Kuchen, wegen der breiten Gestalt, Ar. oft, πλακοῦς πέπεπται, Pax 834, ὀπτᾶν, Ran. 508 ; oft bei Ath. XIV.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)