Or-biē'ū-lar, a.

a. [Lat. orbicularis, from orbiculus, diminutive of orbis, orb; Fr. orbiculaire, Sp. orbicular, It. orbicolare.]

1. Resembling or having the form of an orb; spherical; circular. “Orbicular as the disk of a planet.” De Quincey.
2. (Anat.) Having a spherical or circular form or arrangement; as, the orbicular bone; the orbicular muscles. Dunglison.