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).
Streptococcus pneumoniae (pneumococcus)
A type of bacterium that comes in pairs and is shaped like a lancet (a surgical knife with a short wide two-edged blade). Pneumococcus is the leading cause of bacterial pneumonia and otitis media (middle ear infections) and an important…
Read the definitionRandom terms
Show more- Adrenaline A substance produced by the medulla (inside) of the adrenal gland, adrenaline (the official name in the…
- Health outcomes research The measurement of the value of a particular course of therapy. Health outcomes research is based on the…
- Vasculitis, allergic Vasculitis, allergic: A disease (also more commonly called the Churg-Straus syndrome) characterized by…
- Scoliosis, acquired Lateral (sideways) curving of the spine present at birth or due to a condition present at birth. The…
- Pleural Pertaining to the pleura, the thin covering that protects the lungs. The term 'pleural' is pronounced like…
- Phosphate A form of phosphoric acid. Calcium phosphate makes bones and teeth hard.
- Test, nerve conduction See: Nerve conduction velocity test
- Hysterectomy Hysterectomy: A surgical operation to remove the uterus and, sometimes, the cervix. Removal of the entire…
- Tube, auditory The tube that runs from the middle ear to the pharynx, also known as the Eustachian tube. The function of…
- Stomatitis, Vincent This is trench mouth, a progressive painful infection with ulceration, swelling and sloughing off of dead…
- IDEC-Y2B8 monoclonal antibody See: Yttrium Y 90 ibritumomab tiuxetan
- Vitamin A deficiency Deficiency of niacin, one of the B-complex vitamins, causes pellagra. See: Pellagra.