κυκλώδης
From LSJ
λίγεια μινύρεται θαμίζουσα μάλιστ' ἀηδών → the sweet-voiced nightingale mourns constantly, the sweet-voiced nightingale most loves to warble
English (LSJ)
ες,
A = κυκλοειδής, circular, κ. παραλλαγή a distortion of several vertebrae forming a curve, opp. γωνιώδης, Hp.Art.48. 2 round the outside, opp. ἐν μέσῳ, Id.Epid. 7.84.