English Words Starting With H

• haematosis

  nounVery Low
  /ˌhiːməˈtəʊsɪs/The formation and development of blood cells; hematopoiesis.
• haematoxylin

  nounC2
  /ˌhiːməˈtɒksɪlɪn/A natural dark blue or purple dye extracted from the heartwood of the logwood tree (*Haematoxylum campechianum*).
• haematoxylon

  nounLow (C2)
  /ˌhiːməˈtɒksɪlɒn/A genus of trees, specifically the logwood tree, known for its hard, dark heartwood used in dyeing and histology.
• haematozoon

  nounC2+
  /ˌhiːmətə(ʊ)ˈzəʊɒn/An animal parasite that lives in the blood.
• haematuria

  nounC2
  /ˌhiːməˈtjʊərɪə/The medical condition of having blood in the urine.
• haemin

  nounC2
  /ˈhiːmɪn/A reddish-brown crystalline compound, derived from haemoglobin, containing iron in a specific ferric (Fe³⁺) state, forming crystals of characteristic shape.
• haemochrome

  nounLow/Rare
  /ˈhiːməkrəʊm/A blood pigment; a respiratory pigment, such as haemoglobin, that contains iron and gives blood its red colour.
• haemocoel

  nounVery Low
  /ˈhiːmə(ʊ)ˌsiːl/The primary body cavity of most invertebrates, containing circulating fluid (haemolymph) that bathes the internal organs.
• haemocyanin

  nounC2 / Very Low Frequency / Technical
  /ˌhiːmə(ʊ)ˈsaɪənɪn/A copper-containing respiratory pigment found in the blood of some molluscs and arthropods, functionally analogous to haemoglobin in vertebrates.
• haemocyte

  nounC2
  /ˈhiːmə(ʊ)ˌsʌɪt/A blood cell, especially in invertebrates.
• haemocytometer

  nounVery Rare (C2+ Technical)
  /ˌhiːmə(ʊ)saɪˈtɒmɪtə/A microscope slide or device with a grid etched into it, used to count blood cells manually under a microscope.
• haemodialysis

  nounC1/C2 (Very low frequency; specialised medical term)
  /ˌhiː.məʊ.daɪˈæl.ɪ.sɪs/A medical procedure in which a machine filters waste products, toxins, and excess fluids from the blood when the kidneys are not functioning adequately.
• haemoflagellate

  nounVery low
  /ˌhiːməʊˈflædʒɪleɪt/A parasitic flagellate protozoan that lives in the blood of a vertebrate host.
• haemoglobin

  nounLow-medium frequency
  /ˌhiː.məˈɡləʊ.bɪn/The red protein in red blood cells responsible for transporting oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues back to the lungs.
• haemoglobinometer

  nounVery Low
  /ˌhiːməʊˌɡləʊbɪˈnɒmɪtə/A scientific instrument for measuring the concentration of haemoglobin in blood.
• haemoglobinopathy

  nounVery Low
  /ˌhiː.məˌɡləʊ.bɪˈnɒ.pə.θi/A medical condition resulting from a structural abnormality in the haemoglobin molecule.
• haemoglobinuria

  nounVery Low
  /ˌhiːmə(ʊ)ˌɡləʊbɪˈnjʊərɪə/The presence of haemoglobin in the urine.
• haemolysin

  nounLow
  /ˌhiːmə(ʊ)ˈlʌɪsɪn/A substance or toxin produced by certain bacteria, viruses, or organisms that destroys red blood cells by causing them to rupture (hemolysis).
• haemolysis

  nounC1/C2
  /hiːˈmɒlɪsɪs/The rupture or destruction of red blood cells, releasing haemoglobin.
• haemophile

  nounVery Low
  /ˈhiːmə(ʊ)fʌɪl/A hemophiliac; a person with hemophilia, a genetic disorder impairing the blood's ability to clot.

Showing 141–160 of 5990 words.