severe combined immunodeficiency: 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
peziza domicilina: a discomycetous fungus of the genus Peziza; the fragile fruiting body is a ghostly white but stains yellow when broken; favors strongly alkaline habitats