Source : Webster's Revised Unabridged Dictionary (1913)

Dropsy \Drop"sy\, n.; pl. {Dropsies}. [OE. dropsie, dropesie,
   OF. idropisie, F. hydropisie, L. hydropisis, fr. Gr. ?
   dropsy, fr. ? water. See {Water}, and cf. {Hydropsy}.] (Med.)
   An unnatural collection of serous fluid in any serous cavity
   of the body, or in the subcutaneous cellular tissue.
   --Dunglison.

Source : WordNet®

dropsy
     n : swelling from excessive accumulation of serous fluid in
         tissue [syn: {edema}, {oedema}, {hydrops}]