The outer surface of a piece of flint.
The tissue of a stem or root that lies inward from the epidermis, but exterior to the vascular tissue.
The outer layer of an internal organ or body structure, such as the kidney or the brain.
The narrow plane surface between flutings of a column; a fillet.
One member of a compound eye, as found in insects and crustaceans.
A smooth circumscribed surface.
One of a series of things, such as steps in a project.
Any one of the flat surfaces cut into a gem.
A face of codimension 1 of a polytope.
A criterion that can be used to sort and filter, such as the colour or size of products in an online store.
Any of the small joints at each segment of the spine that provide stability and help guide motion
One among many similar or related, yet still distinct things.
To cut a facet into a gemstone.