αὐλίδιον
From LSJ
ψυχῆς πείρατα ἰὼν οὐκ ἂν ἐξεύροιο πᾶσαν ἐπιπορευόμενος ὁδόν· οὕτω βαθὺν λόγον ἔχει → one would never discover the limits of soul, should one traverse every road—so deep a measure does it possess
English (LSJ)
τό, Dim. of αὐλή,
A place of athletic exercises, ring, Thphr. Char.5.9. II (αὐλός) small tube, Alex.Trall.3.3.
Greek (Liddell-Scott)
αὐλίδιον: τό, ὑποκορ. τοῦ αὐλή· τόπος ἔνθα ἐγίνοντο ἀθλητικαί ἀσκήσεις καὶ ἐπιδείξεις ῥώμης, Θεοφρ. Χαρ. 5. ΙΙ. (ἐκ τοῦ αὐλὸς) μικρὸς σωλήν, Ἀλεξ. Τραλλ. 3. 6, σ. 61.