anemia
n. uncountablen. a medical condition where your blood does not have enough healthy red cells. This makes you feel very tired and weak because your body isn't getting enough oxygen.
n. a pathological condition characterized by a deficiency in red blood cells or hemoglobin, resulting in reduced oxygen-carrying capacity. Often used in clinical contexts to describe a symptom of underlying nutritional or genetic issues.
The doctor says her tiredness is caused by iron-deficiency anemia.
After several weeks of feeling unusually exhausted, he was diagnosed with anemia and prescribed iron supplements.
Chronic anemia can lead to significant cardiovascular strain as the heart attempts to compensate for the blood's diminished ability to transport oxygen to vital organs.
Uncountable in its general medical sense; can be countable when referring to specific clinical types (e.g., 'the various anemias').
She has an anemiaShe has anemiaWhen referring to the general medical condition, the word is uncountable and does not take an indefinite article.