noun. increase in the number of platelets in the blood which tends to cause clots to form; associated with many neoplasms and chronic infections and other diseases.
Example sentences of the word thrombocytosis
1. Noun, singular or mass
These include primary thrombocytosis; this is a high platelet count due to a blood disorder affecting the make up of the blood itself.
2. Preposition or subordinating conjunction
This suggests that even though iron deficiency anemia causes thrombocytosis the actual degree of elevated platelet count is not necessarily severe.