flat, even, level, polished
no movement
no, polished is either the past tense of the verb to polish, e.g. he polished the table; or an adjective, meaning cultured, refined, outstanding, e.g. the soprano gave a polished performance.
Articulation is the medical term meaning joint. The medical terminology combining form meaning joint is arthro-.
A gilding joint is a synovial joint in which bony surfaces that a joint hold are flat or slightly round.
A gemstone that has been cut and polished is called a faceted gemstone. This process enhances the gem's color, clarity, and sparkle by creating flat, polished surfaces known as facets.
A flat cut on a precious stone is called a "table cut". It is a cut where the top of the stone is polished flat with large facets.
The patella is the flat triangular bone in front of your knee joint. The patella is called the kneecap in lay language.
I believe you are describing a prism.
Arthr
Plane Joint.
it is a flat joint