MedicalVocabulary.org
Medical vocabulary with 16,436 clear, complete and reliable definitions.
About MedicalVocabulary.org
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.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
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).
Nocebo
A negative placebo effect as, for example, when patients taking medications experience adverse side effects unrelated to the specific pharmacological action of the drug. The nocebo effect is associated with the person's prior expectations…
Read the definitionRandom terms
Show more- Fetal pleural effusion In the fetus, excess fluid between the two membranes (the pleurae) that envelop the lungs. The pleural…
- Mydriasis Dilation of the pupils induced by eyedrops. The opposite of miosis.
- Tonometry Tonometry: A standard eye test that determines the fluid pressure inside the eye. Increased pressure is a…
- Gland, bulbourethral See: Bulbourethral gland
- Sclerosing panencephalitis, subacute (SSPE) A chronic brain disease of children and adolescents that occurs months to often years after an attack of…
- Glans 1) The glans penis, the rounded head of the penis. 2) The rounded head of the clitoris
- Kussmaul breathing Air hunger.
- Potassium deficiency Inadequate potassium intake and hence potassium levels in the blood that are abnormally low. This state is…
- Open reading frame A long sequence of DNA that has no stop codon (no signal to stop reading) and therefore may encode part or…
- Sulfa drug One of the sulfonamides, the sulfa-related antibiotics which are used to treat bacterial and some fungal…
- Graves disease Generalized diffuse overactivity ('toxicity') of the entire thyroid gland which becomes enlarged into a…
- Incurable Not amenable to a cure. Incapable of being cured, healed and made well again. Many pancreatic cancers are…