The Collaborative International Dictionary of English v.0.48:

articulatio \articulatio\ n. [Latin.] (anatomy)
   the point of connection between two bones or elements of a
   skeleton especially if the articulatio allows motion.

   Syn: joint, articulation.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

articulatio
    n 1: (anatomy) the point of connection between two bones or
         elements of a skeleton (especially if it allows motion)
         [syn: joint, articulation, articulatio]