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).
Hyponatremia
An abnormally low concentration of sodium in the blood. Too little sodium can cause cells to malfunction, and extremely low sodium can be fatal. Hyponatremia has many causes including medications such as diuretics and antidepressants…
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Show more- Glucocorticoid A hormone that predominantly affects the metabolism of carbohydrates and, to a lesser extent, fats and…
- Lymphedema A common chronic, debilitating condition in which excess fluid called lymph collects in tissues and causes…
- Respiratory distress syndrome (RDS) Formerly known as hyaline membrane disease, a syndrome of respiratory difficulty in newborn infants caused by…
- Lymphocytic leukemia, acute (ALL) Leukemia, acute (ALL): A rapidly progressing form of leukemia in which there are too many very young…
- Library, cDNA A collection of DNA sequences generated from mRNA (messenger RNA) sequences. This type of DNA library…
- Rectal incontinence Inability to hold feces in the rectum due to failure of voluntary control over the anal sphincters with…
- Ectopic In the wrong place. Out of place. An ectopic kidney, for example, is one that is not in the usual location…
- Menstrual irregularity The normal menstrual cycle is about four weeks long, and often follows the phases of the moon. Its length…
- Superjacent Lying just above or upon. Overlying. The opposite of superjacent is subjacent. Other related terms include…
- FLT-3 inhibitor A gene-targeted therapy for a common subtype of acute myeloid leukemia (AML) known as FLT-positive AML in…
- Tularemia A bacterial disease caused by infection with a bacterium called Francisella tularensis that usually occurs in…
- Double pneumonia Inflammation of both lungs. Medically called bilateral pneumonia