MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
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The most complete online medical dictionary: 16,436 terms covering anatomy, physiology, pathologies, diagnostic exams, pharmacology and every clinical specialty.
Designed for 3 kinds of users:
- Patients and family who want to understand a diagnosis, a medical report or instructions from a doctor.
- Students of medicine, nursing, physiotherapy and the health professions, dealing with technical terminology.
- Doctors, pharmacists and healthcare workers who need a quick and reliable reference.
Definitions are written in clear, accessible language while keeping the rigor required for professional use. Each term has a dedicated URL, instant autocomplete search, and can be shared on WhatsApp, Facebook, X and via email with one click.
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Disclaimer: the content is for informational and educational purposes only and does not replace medical advice. If you have doubts about your health, always consult a qualified professional. In case of emergency call your local emergency number (911 in the US, 112 in the EU).
Metered-dose inhaler
Abbreviated MDI. A device that delivers a measured amount of medication as a mist the patient can inhale. A MDI consists of a pressurized canister of medication in a case with a mouthpiece. MDIs are portable, efficient and convenient…
Read the definitionRandom terms
Show more- Osler-Rendu-Weber syndrome See: Hereditary hemorrhagic telangiectasia
- Naltrexone A derivative of naloxone used as an orally active and long-acting potent pure narcotic antagonist. Naltrexone…
- Quadriplegic Pertaining to quadriplegia (paralysis of all four limbs -- both arms and both legs), as from a high spinal…
- Keratosis follicularis A genetic skin disease characterized by slowly progressive hardening of the skin (keratoses) around the hair…
- Med-school syndrome See: Medical school syndrome
- Carbuncles A skin abscess, a collection of pus that forms inside the body. Antibiotics are often not very helpful in…
- Cramp, writer's A dystonia that affects the muscles of the hand and sometimes the forearm and only occurs during handwriting…
- Syndrome, deafness-ichthyosis-keratitis See Keratitis-ichthyosis-deafness syndrome
- Flying, fear of An irrational fear of flying is called aerophobia. Aerophobia also refers to irrational fear of fresh air or…
- SI joint pain See sacroiliac joint dysfunction
- Human T-lymphotropic virus type III An obsolete term for the human immunodeficiency virus, now commonly called HIV
- Vessel, afferent A vessel that carries blood toward the heart. A vein or venule