English Words Starting With I

• immortals

  plural-nounB2
  /ɪˈmɔː.təlz/Beings or entities that live forever and cannot die.
• immortelle

  nounVery low (C2+ / Archaic/Literary/Technical)
  /ˌɪmɔːˈtɛl/A type of everlasting flower, typically a helichrysum or similar, that retains its shape and colour when dried.
• immovable

  adjectivenounC1
  /ɪˈmuːvəbl/Literally, not able to be moved; unable to change position.
• immoveables

  plural-nounC2
  /ɪˈmuːvəbl̩z/Property consisting of land and anything permanently attached to it, such as buildings; real estate.
• immune

  adjectivenounB2
  /ɪˈmjuːn/Protected against or not susceptible to a particular disease, infection, or harmful influence.
• immune checkpoint inhibitor

  nounC2
  /ɪˈmjuːn ˈtʃek.pɔɪnt ɪnˈhɪb.ɪ.tə(r)/A type of drug that blocks proteins on immune cells, allowing them to attack cancer cells more effectively.
• immune checkpoint therapy

  nounLow (Specialized Technical)
  /ɪˌmjuːn ˈtʃekpɔɪnt ˈθɛrəpi/A type of cancer treatment that uses drugs to block proteins on immune cells (checkpoints) that cancer uses to avoid being attacked.
• immune complex

  nounC2
  /ɪˈmjuːn ˈkɒm.plɛks/A structure formed when an antibody binds to its specific antigen.
• immune response

  nounC1-C2
  /ɪˈmjuːn rɪˈspɒns/The reaction of the body's immune system to a harmful substance (antigen) such as a virus, bacteria, or allergen, involving the production of antibodies and specialized cells to fight it.
• immune serum

  nounC2 / Specialised Technical
  /ɪˌmjuːn ˈsɪərəm/A blood serum containing antibodies from an immunised person or animal, used to confer temporary immunity or treat disease.
• immune system

  nounB2
  /ɪˈmjuːn ˌsɪs.təm/The biological structures and processes within an organism that provide protection against disease by identifying and neutralizing pathogens like bacteria, viruses, and parasites.
• immunity

  nounC1
  /ɪˈmjuː.nə.ti/Protection or exemption from something, especially a disease or legal obligation.
• immunity bath

  nounVery Low (Specialist/Economic Journalism)
  /ɪˈmjuː.nə.ti ˌbɑːθ/A government programme or policy that offers broad, sweeping protection (like immunity) to a specific sector or group, shielding them from certain regulations, lawsuits, or consequences, often as a temporary economic stimulus measure.
• immunization

  nounC1
  /ˌɪm.jʊ.naɪˈzeɪ.ʃən/The process of making a person or animal immune to a specific infectious disease, typically by administering a vaccine.
• immunize

  verbverb-transitiveB2
  /ˈɪm.jə.naɪz/To make someone resistant to a disease, typically by administering a vaccine.
• immunoadsorbent

  nounVery low / Technical
  /ˌɪm.jə.nəʊ.ədˈzɔː.bənt/a substrate material used to specifically bind and remove antibodies or antigens from a solution, primarily in laboratory purification and analysis.
• immunoassay

  nounC1/C2
  /ˌɪmjʊnəʊˈæseɪ/A laboratory technique for detecting or measuring a specific substance (e.g., a protein, hormone, or drug) using the specific binding of an antibody to its antigen.
• immunobiology

  nounVery Low
  /ˌɪmjuːnəʊbaɪˈɒlədʒi/The branch of biology that deals with the immune system, its structure, function, and interactions.
• immunochemistry

  nounLow
  /ˌɪmjʊnəʊˈkemɪstri/The branch of chemistry concerned with the study of immune systems and the chemical aspects of immunity and immune responses.
• immunocompetence

  nounC2 (Very Low Frequency / Specialised)
  /ˌɪmjʊnəʊˈkɒmpɪtəns/The physiological ability of the body's immune system to mount a normal and effective defensive response against antigens, such as pathogens, infections, or cancerous cells.

Showing 641–660 of 3621 words.