Definition of supercilium:
(n) :
The region of the eyebrows.
(n) :
(anatomy, rare) The eyebrow (arch of hair above each eye).
(n) :
(zoology) A superciliary marking or structure, especially in a bird.
(n) :
(anatomy) The overhanging margin of a bony cavity (as of the acetabulum).
(n) :
(architecture, classical) The narrow fillet above the cymatium of a cornice.
(n) :
A fillet above and below the scotia of an Attic base.