English Words Starting With A

• adenese

  nounNon-existent
  This word does not exist in standard English dictionaries.
• adeni

  nounExtremely Rare / Non-Standard
  /ˈadɪniːn/ (for the standard 'adenine')This is not a standard English word. It appears to be a misspelling or non-standard variant of the noun 'adenine', a biochemical compound that is one of the four nucleobases in the nucleic acids DNA and RNA.
• adenine

  nounLow
  /ˈæd.ə.niːn/A chemical compound that is one of the four nucleobases in the nucleic acids DNA and RNA. It pairs with thymine in DNA and with uracil in RNA.
• adenitis

  nounC2
  /ˌæd.ɪˈnaɪ.tɪs/Inflammation of a gland or lymph node.
• adenocarcinoma

  nounLow frequency
  /ˌæd.ɪ.nəʊ.ˌkɑː.sɪˈnəʊ.mə/A malignant tumour originating in glandular epithelial tissue.
• adenohypophysis

  nounC2/Highly Technical
  /ˌadɪnəʊhʌɪˈpɒfɪsɪs/The glandular anterior lobe of the pituitary gland.
• adenoid

  adjectivenounC1
  /ˈæd.ɪ.nɔɪd/A mass of lymphoid tissue located in the upper part of the throat, behind the nose.
• adenoidectomy

  nounC2
  /ˌadɪnɔɪˈdɛktəmi/The surgical removal of the adenoids.
• adenoiditis

  nounVery Low
  /ˌadɪnɔɪˈdʌɪtɪs/Inflammation of the adenoids, typically causing breathing difficulties and discomfort.
• adenoids

  plural-nounB2-C1
  /ˈæd.ɪ.nɔɪdz/A mass of lymphoid tissue at the back of the nasal cavity, part of the immune system.
• adenology

  nounVery Low (Highly Specialized Technical)
  /ˌæd.ɪˈnɒl.ə.dʒi/The scientific study of glands.
• adenoma

  nounC2 / Very Low Frequency
  /ˌadɪˈnəʊmə/A non-cancerous tumor or growth that originates from glandular tissue.
• adenopathy

  nounVery low
  /ˌæd.ɪˈnɒp.ə.θi/Enlargement or disease of the lymph nodes.
• adenosarcoma

  nounVery low
  /ˌædɪnəʊsɑːˈkəʊmə/A malignant tumor that arises from glandular tissue mixed with connective tissue components.
• adenosine

  nounC1
  /əˈdɛnəsiːn/A nucleoside composed of adenine linked to a ribose sugar molecule, a fundamental component of nucleic acids and cellular energy molecules.
• adenosine cyclic monophosphate

  nounLow
  /əˌdɛn.ə.siːn ˌsaɪ.klɪk ˌmɒn.əʊˈfɒs.feɪt/A cyclic nucleotide that functions as a key intracellular signaling molecule, often described as a second messenger in cellular communication.
• adenosine deaminase

  nounVery Low Frequency (C2)
  /əˈdɛn.ə.siːn diːˈæm.ɪ.neɪz/An enzyme that catalyzes the irreversible deamination of adenosine or deoxyadenosine to inosine or deoxyinosine, playing a critical role in purine metabolism and immune system function.
• adenosine deaminase deficiency

  nounVery low
  /ˌæd.ən.əʊ.sin diːˈæm.ɪ.neɪs dɪˈfɪʃ.ən.si/A rare genetic disorder caused by the lack of the enzyme adenosine deaminase, leading to severe dysfunction of the immune system.
• adenosine diphosphate

  nounC2
  /əˌdɛn.ə.siːn daɪˈfɒs.feɪt/A nucleotide composed of adenosine and two phosphate groups, which serves as a key energy carrier in cellular metabolism.
• adenosine monophosphate

  nounC2 (Highly Technical)
  /əˌdɛnəsiːn ˌmɒnəʊˈfɒsfeɪt/A nucleotide composed of adenine, ribose, and one phosphate group, fundamental to cellular energy transfer.

Showing 1261–1280 of 8734 words.