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, sentinel
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…
Read the definitionRandom terms
Show more- Flu vaccine, nasal-spray See: Nasal flu vaccine
- Rickets A disease of infants and children that disturbs normal bone formation (ossification). Rickets is a failure to…
- HHV-4 Human herpesvirus 4. See Epstein-Barr virus.
- Imprinting, psychological A remarkable genetic phenomenon that occurs in animals, and theoretically humans, in the first hours of life…
- Rheumatic fever An illness that occurs following a streptococcus infection (such as a 'strep throat') or scarlet fever and…
- Jellyfish itch An intensely itchy rash due to contact with the tiny thimble jellyfish (Linuche unguiculata). These jellyfish…
- Disease, Legionnaire A disease due to the bacteria Legionella pneumophila found in plumbing, shower heads and water-storage tanks…
- Lightening Not to be confused with a discharge of atmospheric electricity, lightening refers to the sensation that a…
- Familial Parkinson disease type 11 A familial form of Parkinson disease inherited in an autosomal dominant manner due to a gene on chromosome…
- Mucus, nasal See: Nasal mucus
- Placental chorioangioma A benign vascular (blood vessel) tumor of the placenta (afterbirth). Large chorioangiomas cause complications…
- Sanfilippo syndrome The most common disorder of mucopolysaccharide metabolism, a syndrome in which the onset of clinical…