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cystis

cystis Obs.
  (ˈsɪstɪs)
  Also 6 chistis.
  [med. or mod.L., a. Gr. κύστις bladder.]
  = cyst.

1543 Traheron Vigo's Chirurg. ii. v. 39 Thys caustyue Medicyne hathe strengthe, to breake the node..euen to the chistis or purse. 1646 Sir T. Browne Pseud. Ep. 110 The humour [is] contained..in a vesicle or little bladder, though some affirme it hath no cystis or bag at all. 1758 Le Dran's Observ. Surg. (1771) 249 The Cystis of the Hydrocele.

Oxford English Dictionary

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