- A disorder characterized by the presence of anemia, abnormally large red blood cells (megalocytes or macrocytes), and megaloblasts.
Definition from: MeSH via Unified Medical Language System at the National Library of Medicine
- An anemia (as pernicious anemia) characterized by the presence of megaloblasts in the circulating blood.
Definition from: Merriam-Webster's Medical Dictionary by Merriam-Webster Inc.
See also Understanding Medical Terminology.