severe com·bined immunodeficiencyAHD[kəm-bīndʹ] D.J.[kəmˈbaɪnd]K.K.[kəmˈbaɪnd]n.（名词）abbr. SCID【缩写】
A usually fatal congenital disorder of the immune system in which the body is unable to produce enough B cells and T cells to resist infection.重症联合免疫不全：通常致死的先天免疫系统紊乱，在该系统紊乱中机体不能产生足够的B细胞和T细胞来抵抗感染