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haemopoiesis Line breaks: haemo|poi¦esis
Pronunciation: /ˌhiːmə(ʊ)pɔɪˈiːsɪs/
(US hemopoiesis)

Definition of haemopoiesis in English:


[mass noun]
The production of blood cells and platelets, which occurs in the bone marrow.
Example sentences
  • Under normal conditions of hemopoiesis, the bone marrow acts as a site for the turnover and traffic of mature leukocytes to the peripheral circulation.
  • One may speculate that these immature B cells may play a critical role in the regenerative regulation of hemopoiesis, as well as in immune functions in the context of chronic cytopenias.
  • In the massively enlarged spleen, extramedullary hemopoiesis was prominent, with clusters of atypical megakaryocytes with vacuoles and erythrophagocytosis.


Example sentences
  • These sites all contain a primitive, self-renewing population of blood-cell precursors, the haemopoietic stem cells, which are capable of producing all the different cells of the blood.
  • If a malignant haemopoietic condition relapses after an allogeneic transplant, lymphocyte infusions from the original donor can return the patient to remission by exploiting the graft versus tumour effect.
  • The patients in our study demonstrated a PCP-associated decrease in total blood lymphocyte counts, suggesting that long-term exposure to PCP inhibits compensatory hemopoietic activity.


Early 20th century: from haemo- 'of blood' + Greek poiēsis 'making'.

Definition of haemopoiesis in:
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