The use of acceptance tests in subsequent iterations is also known as regression testing. Acceptance testing is a key feature of test-driven development (TDD). In Scrum: Scrum does not specify testing methods, and testing is not a part of the Scrum framework.
Medical Definition of MALIGNANCY. 1. : the quality or state of being malignant.
benign - not dangerous to health; not recurrent or progressive (especially of a tumor) pathology - the branch of medical science that studies the causes and nature and effects of diseases malignant - dangerous to health; characterized by progressive and uncontrolled growth (especially of a tumor)