‖n. [ NL., perhaps fr. Gr. sy`n with + L. ovum egg: cf. F. synovie. ] (Anat.) A transparent, viscid, lubricating fluid which contains mucin and secreted by synovial membranes; synovial fluid. [ 1913 Webster ]
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 ]