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severe combined immune deficiency: Meaning and Definition of

severe' combined' immune' defi"ciency

Pronunciation: [key]
? Pathol. Pathol.
  1. a group of rare congenital disorders in which both cell-mediated and humoral immunity are lacking, causing susceptibility to a wide variety of illnesses and an inability to live in a normal environment.
Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease.