Fac"et (?), n. [F. facette, dim. of face face. See Face.] 1. A little face; a small, plane surface; as, the facets of a diamond. [Written also facette.]

2. (Anat.) A smooth circumscribed surface; as, the articular facet of a bone.

3. (Arch.) The narrow plane surface between flutings of a column.

4. (Zoöl.) One of the numerous small eyes which make up the compound eyes of insects and crustaceans.

Fac"et, v. t. [imp. & p. p. Faceted; p. pr. & vb. n. Faceting.] To cut facets or small faces upon; as, to facet a diamond.

[[noun]]
• any one of the flat surfaces cut into a gem
       The facets of each diamond were masterfully cut to enhance their value
  
• one among the various steps in a project
       We had just about completed the research facet of the project when the order came to cancel it.