From Longman Dictionary of Contemporary Englishblood groupˈblood group noun [countable] especially British EnglishHBHMH one of the classes into which human blood can be separated, including A, B, AB, and O SYN blood type American English
Examples from the Corpus
blood group• The first thing he saw was her blood group.• Is blood group an inherited characteristic?• Some of the antibodies we used were studied at the international workshop on blood group antibodies at Paris, 1987.• And three of them needed A-Negative, Faye's blood group.• One test will determine your blood group, and another will reveal your Rhesus factor. 