AEB means: AEB is a medical abbreviation standing for 'as evidenced by', used in clinical nursing and medical documentation to link a diagnosis or condition to supporting observed data. For example: 'patient is. It is informal slang, fine in casual speech but not suited to formal contexts. There is no real cause for parental concern; it is descriptive vocabulary rather than risky behaviour. It is an education-system term, so usage is institutional and routine.