English Words Starting With H

• haemachrome

  nounExtremely Low / Obsolete Technical
  /ˈhiːməkrəʊm/The pigment that gives blood its red colour, primarily haemoglobin.
• haemacytometer

  nounLow
  /ˌhiːməsaɪˈtɒmɪtə/A device used to count blood cells.
• haemagglutinate

  verbC2
  /ˌhiː.məˈɡluː.tɪ.neɪt/To cause red blood cells to clump together.
• haemagglutinin

  nounC2
  /ˌhiːməˈɡluːtɪnɪn/A protein or carbohydrate found on the surface of some viruses (especially influenza) that causes red blood cells to clump together (agglutinate).
• haemagogue

  adjectivenounVery Low
  /ˈhiːməɡɒɡ/A substance or agent that promotes the flow of blood, especially one that induces menstrual flow.
• haemangioma

  nounVery Low
  /hiːˌmændʒiˈəʊmə/A benign tumour or growth, typically present at or shortly after birth, made up of a mass of newly formed blood vessels.
• haematein

  nounC2 (Very Low Frequency)
  /ˌhiːməˈtiːɪn/A reddish-brown to violet crystalline compound derived from hematoxylin, used as a biological stain, especially for nuclei in histology.
• haematemesis

  nounC2 / Very low frequency (Specialized medical term)
  /ˌhiːməˈtɛmɪsɪs/The vomiting of blood.
• haematic

  adjectivenounVery Low (C2+ / Technical)
  /hiːˈmætɪk/Relating to or containing blood; blood-red in colour.
• haematin

  nounC2 (Very Rare/Technical)
  /ˈhiːmətɪn/A bluish-black or brownish pigment derived from oxidized haemoglobin, containing iron.
• haematinic

  adjectivenounC2 (Very Low Frequency)
  /ˌhiːməˈtɪnɪk/A substance that improves the quality or increases the haemoglobin content of the blood.
• haematite

  nounC2
  /ˈhiːmətaɪt/A common iron oxide mineral (Fe₂O₃), typically reddish-brown to black in colour, which is a major ore of iron.
• haematoblast

  nounRare / Very Specialized
  /ˈhiːmətə(ʊ)blɑːst/A primitive, immature cell found in bone marrow that can develop into a red blood cell.
• haematocele

  nounVery Rare
  /ˈhiːmətəʊˌsiːl/A medical condition involving a localised collection of blood in a body cavity or tissue, often referring to the tunica vaginalis or scrotum.
• haematocrit

  nounC2
  /ˈhiː.mə.tə(ʊ).krɪt/The proportion of a blood sample that is made up of red blood cells, expressed as a percentage.
• haematogenesis

  nounC2
  /ˌhiː.mə.təʊˈdʒɛn.ɪ.sɪs/The formation and development of blood cells.
• haematology

  nounC2
  /ˌhiːməˈtɒlədʒi/The branch of medicine and physiology concerned with the study, diagnosis, and treatment of blood and blood disorders.
• haematolysis

  nounC2
  /ˌhiːməˈtɒlɪsɪs/The destruction of red blood cells resulting in the release of haemoglobin.
• haematoma

  nounLow
  /ˌhiː.məˈtəʊ.mə/A localized swelling filled with blood that has leaked from damaged blood vessels, typically forming a mass under the skin or within a tissue/organ.
• haematopoiesis

  nounLow
  /ˌhiː.mə.təʊ.pɔɪˈiː.sɪs/The biological process of blood cell formation.

Showing 121–140 of 5990 words.