[1] : The Collaborative International Dictionary of English v.0.48

synovial \syno"vial\, a. cf. f. synovial. anat.
   of or pertaining to synovia; secreting synovia.
   1913 webster

   synovial capsule, a closed sac of synovial membrane
      situated between the articular surfaces at diarthrodial
      joints.

   synovial fluid, synovia.

   synovial membrane, the dense and very smooth connective
      tissue membrane which secretes synovia and surrounds
      synovial capsules and other synovial cavities.
      1913 webster
see also:
synovial capsule synovial fluid synovial membrane 

[2] : WordNet (r) 2.0

synovial
     adj : relating to or secreting synovia

Synovial >> S Words
Synovial, definition of term: Synovial
synovial_pag1.html

Synovial Joint >> S Words
Synovial Joint, definition of term: Synovial Joint
synovial+joint_pag1.html