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).
Proto-oncogene
A normal gene which, when altered by mutation, becomes an oncogene that can contribute to cancer. Proto-oncogenes may have many different functions in the cell. Some proto-oncogenes provide signals that lead to cell division. Other…
Read the definitionRandom terms
Show more- Morning sickness Nausea and vomiting of pregnancy. Morning sickness is a misnomer, because it can occur at any time of the day…
- Endarterectomy An operation to clean out an artery and restore normal blood flow through the artery. An endarterectomy is…
- Fibrosis, pulmonary See: Pulmonary fibrosis
- Iatromelia Ineffective or negligent medical treatment. From 'iatro-' meaning a relationship to a physician or medicine +…
- Antiviral An agent that kills a virus or that suppresses its ability to replicate and, hence, inhibits its capability…
- Humerus The long bone in the arm which extends from the shoulder to the elbow.
- Catheter, central venous A catheter (tube) that is passed through a vein to end up in the thoracic (chest) portion of the vena cava…
- Deoxyribonucleic acid DNA. One of two types of molecules that encode genetic information. (The other is RNA. In humans DNA is the…
- Sign, toe An important neurologic test based upon what the toes do when the sole of the foot is stimulated. If the big…
- Compassionate use Term used in the US for a method of providing experimental therapeutics prior to final FDA approval for use…
- Acetylcholinesterase An enzyme that breaks down the neurotransmitter acetylcholine at the synaptic cleft (the space between two…
- Athleats feet See: Athlete's foot