- pernicious anemia, pernicious anaemia, malignant anemia, malignant anaemia - a chronic progressive anemia of older adults; thought to result from a lack of intrinsic factor (a substance secreted by the stomach that is responsible for the absorption of vitamin B12)
--1 is a kind of anemia, anaemia
--1 has particulars:megaloblastic anemia, megaloblastic anaemia; metaplastic anemia, metaplastic anaemia