Noun edit ab (plural abs) (slang) An abscess caused by injecting an illegal drug, usually heroin. Find the latest AllianceBernstein Holding L.P. (AB) stock quote, history, news and other vital information to help you with your stock trading and investing. Allen Bradley industrial automation components, integrated control and information solutions from Rockwell Automation make you as productive as possible. How Is My Blood Type Determined? It’s inherited. Like eye color, blood type is passed genetically from your parents. Whether your blood group is type A, B, AB or O is based on the blood types of your mother and father. This disambiguation page lists articles associated with the title AB. If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article. Less than 4% of the U.S. population have AB positive blood. AB positive blood type is known as the “universal recipient” because AB positive patients can receive red blood cells from all blood types. Looking for online definition of AB or what AB stands for? AB is listed in the World's most authoritative dictionary of abbreviations and acronyms This is a pivotal moment for AB, said AB's CEO Seth Bernstein. Onur's appointment to President underscores his criticality to AB and Equitable Holdings, and his strong connections both within the firm and across the industry. The meaning of AB is an abdominal muscle —usually plural. How to use ab in a sentence. In summary, AB is an abbreviation that can stand for various terms depending on the context, and its interpretation can vary across different fields such as technology, business, education, geography, government, law and other specialized areas.