1) Gliding joint 
• (n.) A form of diarthrodial articulation in which the articular surfaces are nearly flat, so that they form only an imperfect ball and socket.
(ahr-thro´de-ә) gliding joint. adj., arthro´dial., adj.
Ar·thro'di·a noun [ New Latin , from Greek ..., from ... well articulated; 
Type: Term Pronunciation: ar-thrō′dē-ă Synonyms: plane joint
a joint, as in the carpal articulations, in which the surfaces glide over each other in movement. Also called