† synovyObs. Anglicized form of synovia. (Cf. F. synovie.) 1684W. Russell Phys.Treat. 92 In every true Gout..the tormenting Pain thereof is only in the Joynt-Water, or Synovy between the Joynts.1824R. Boyce Fam.Surg. 28 To stop Synovy, or Joint Oil [in Horses].