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).
Lymph node
The first lymph node ("gland") to receive lymphatic drainage from a tumor. Which lymph node is the sentinel node for a given tumor is determined by injecting around the tumor a tracer substance that will travel through the lymphatic system…
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Show more- Hepatology The field of liver disease. The liver is the body's largest organ and hepatology is a large field. It…
- Nephroblastomatosis The presence of multiple embryonic rests of tissue within the kidney. These nephrogenic rests usually are…
- Fracture, compound A fracture in which the bone is sticking through the skin. Also called an open fracture. NTER> A fracture is…
- Headache Headache: A pain in the head with the pain being above the eyes or the ears, behind the head (occipital), or…
- Syphilis, congenital The third stage of syphilis, in which the syphilis spirochetes infect the brain and other organs of the body…
- Absolute CD4 count The number of 'helper' CD4 T-lymphocytes in a cubic millimeter of blood. With HIV, the absolute CD4 count…
- Retraction syndrome See: Duane syndrome
- RTS See Rett syndrome.
- Mucolipidosis I A type of mucolipidosis (see below) characterized by deficiency of the enzyme neuraminidase (sialidase)…
- Pneumoconiosis The deposition of particulate matter such as asbestos and silicon in the lungs. See also: Black lung disease
- Scale, Centigrade Thermometer scale in which the freezing point of water is 0°C and the boiling point of water at sea level is…
- Reversal of organs, total This condition (medically called situs inversus totalis) involves complete transposition (right to left…