Final answer:
The synovial joint that allows for gliding and slight non-axial movements only is the plane joint, enabling sliding movements over flat or slightly curved bones.
Step-by-step explanation:
The synovial joint that allows for gliding and slight non-axial movement only is known as a plane joint. These joints, such as those found between the tarsal bones of the foot, feature articular surfaces that are flat or slightly curved, allowing one bone to slide over another. This gliding motion can occur in multiple directions, but these joints do not allow for axial rotation or other types of movement. The plane joints in the wrists and ankles are examples of where these movements occur, providing flexibility that is crucial for various activities.