Webster’s Revised Unabridged Dictionary · 1913
Orbicular
Or·bic′u·lar, a. [L. orbicularis, fr. orbiculus, dim. of orbis orb: cf. F. orbiculaire.] Resembling or having the form of an orb; spherical; circular; orbiculate. — Or·bic′u·lar·ly, adv. — Or·bic′u·lar·ness, n.
Orbicular as the disk of a planet. De Quincey.