late 13c., a shortening of Middle English ydropsy, from Old French idropsie, from Latin hydropsis, from Greek hydrops (genitive hydropos) "dropsy," from hydor "water" (see water (n.1)).
dropsy drop·sy (drŏp'sē)n. Edema. No longer in technical use.
mentioned only in Luke 14:2. The man afflicted with it was cured by Christ on the Sabbath.