περικνίδιον
From LSJ
ὁποία δ' ἦν αὕτη ἡ παίδευσις δύναταί τις γιγνώσκειν διάλογόν τινα τοῦ Πλάτωνος σκοπῶν → It's possible to find out what kind of education that was by examining one of Plato's dialogues
English (LSJ)
[κνῐ], τό, qume/wn perikni/dia
A stalks or leaves of thyme, AP9.226 (Zon., dub.).