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.
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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).
Thalassemia, alpha
A blood disorder, thalassemia is not one disease but rather a group of disorders that have a single feature in common: they all have a genetic defect in the production of hemoglobin, the protein that enables red blood cells to carry…
Read the definitionRandom terms
Show more- Pulmonary Having to do with the lungs. (The word comes from the Latin pulmo for lung).
- REM sleep Sleep: REM sleep is the portion of sleep when there are rapid eye movements (REMs). Dreams occur during REM…
- Protein ZIP code An informal name for a molecular cell biology system of signals or 'address tags' that guide the movement of…
- Metrorrhagia Uterine bleeding at irregular intervals, particularly between the expected menstrual periods. Metrorrhagia…
- Q fever vaccine A vaccine against Q fever, an illness first recognized in Australia in the 1930's that affects people dealing…
- Erection, penile When the penis fills with blood and is rigid. The penis contains two chambers, called the corpora cavernosa…
- Na (sodium) Na is the chemical symbol for sodium. From natrium, a synonym for sodium. Sodium is the major positive ion…
- Headache, stress See headache, tension
- Pulmonary trunk A vessel that arises from the right ventricle of the heart, extends upward, and divides into the right and…
- Migraine without aura See: Common migraine
- Peptidase An enzyme that can break down a peptide into its component amino acids
- Hyperglycemia Hyperglycemia: A high blood sugar. An elevated level specifically of the sugar glucose in the blood…