scid
  錫特
  SCID 縮寫
  SCID
       n : a congenital disease affecting T cells that can result from
           a mutation in any one of several different genes;
           children with it are susceptible to infectious disease;
           if untreated it is lethal within the first year or two of
           life [syn: severe combined immunodeficiency, severe
           combined immunodeficiency disease]