CBRN Views 9 meanings found CBRN is the standard abbreviation for the combined chemical, biological, radiological and nuclear threat category in defence and safety studies, though it also refers to California’s nursing board. Medical California Board of Registered Nursing Community Christian Broadcasting Radio Network Governmental Caribbean Basin Radar Network Academic & Science Chemical Biological Radioactive and Nuclear Chemical Biological Radiological Nuclear Checmical Biological Radiological Nuclear Chemical Biological Radiological And Nuclear Chemical Biological Radiological Or Nuclear Cbrnchemical Biological Radiological Nuclear