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.