noun
thrombocytopenia
Medical term for a condition in which the blood has a lower than normal number of platelets.
血小板減少症の患者は出血しやすくなる。
Patients with thrombocytopenia tend to bleed more easily.
Compound of 血小板 (platelet) + 減少 (decrease) + 症 (condition/disease). The exact historical derivation is uncertain, but the term follows standard medical naming patterns.