a. [ L. orbicularis, fr. orbiculus, dim. of orbis orb: cf. F. orbiculaire. ] Resembling or having the form of an orb; spherical; circular; orbiculate. --
Orbicular as the disk of a planet. De Quincey. [ 1913 Webster ]
a. [ Plano- + orbicular. ] Plane or flat on one side, and spherical on the other. [ 1913 Webster ]
a. Having the shape of a half orb or sphere. [ 1913 Webster ]