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).
Sleep paralysis
A frightening form of paralysis that occurs when a person suddenly finds himself or herself unable to move for a few minutes, most often upon falling asleep or waking up. Sleep paralysis is due to an ill-timed disconnection between the…
Read the definitionRandom terms
Show more- Human reproductive cloning HTLV. A retrovirus that causes adult T-cell leukemia. HTLV is endemic (constantly present) in southern Japan…
- Petechiae Pinpoint flat round red spots under the skin surface caused by intradermal hemorrhage (bleeding into the…
- Osseous Having to do with the bone, consisting of bone, or resembling bone. From 'os' which is a synonym for 'bone.'…
- De Musset sign Rhythmic nodding or bobbing of the head in synchrony with the heart beat, a sign of aortic insufficiency…
- Hemophilia B Hemophilia due to deficiency of coagulation factor IX in the blood which results in prolonged oozing after…
- STEP procedure See: Serial transverse enteroplasty
- Aspiration, joint A procedure whereby a sterile needle and syringe are used to drain joint fluid from the joint. This is…
- Backbone The spine. A flexible row of bones stretching from the base of the skull to the tailbone
- Vomitus Matter from the stomach that has come up into and may be ejected beyond the mouth, due to the act of…
- Smallpox vaccine A vaccine containing a live virus called vaccinia used to prevent smallpox. The vaccine does not contain the…
- Lymphocytic Referring to lymphocytes, a type of white blood cell.
- Hypothyroidism, congenital Hypothyroidism, congenital: Underactivity of the thyroid gland at birth, resulting in growth retardation…