ἀμφίκυρτος

English (LSJ)

ον,

   A convex on each side, like the moon in her second or third quarter, gibbous, Arist.Cael.291b20, Thphr.Sign.56, Plu.2.381d.    2 doubly convex, of a curvilinear angle, opp. ἀμφίκοιλος, Procl.in Euc.Def.8p.127F., al.; γραμμαί Gal.2.673; λεπίδες Ph.Bel.70.23.