supercilium

plural supercilia

1. The eyebrow (arch of hair above each eye).
   1. rareanatomyThe region of the eyebrows.
   2. rareanatomyThe overhanging margin of a bony cavity (as of the acetabulum).
   3. rareanatomyA superciliary marking or structure, especially in a bird.
2. The narrow fillet above the cymatium of a cornice.
   1. classicalarchitectureA fillet above and below the scotia of an Attic base.
   2. classicalarchitectureThe lintel or transverse part of a door frame.
3. humorousrareSuperciliousness, haughtiness; an instance of this, a supercilious demeanor.