"blood group." YourDictionary, n.d. Web. 17 October 2018. <http://www.yourdictionary.com/blood-group>.
blood group. (n.d.). Retrieved October 17th, 2018, from http://www.yourdictionary.com/blood-group
Any of several immunologically distinct, genetically determined classes of human blood that are based on the presence or absence of certain antigens and are clinically identified by characteristic agglutination reactions. Also called blood type .