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).
Negative, false
A result that appears negative but fails to reveal a situation. An example of a false negative: a particular test designed to detect cancer of the toenail is negative but the person has toenail cancer
Read the definitionRandom terms
Show more- Pregnant The state of carrying a developing fetus within the body. The word 'pregnant' comes from the Latin pre-…
- Y chromosome infertility Male infertility with oligozoospermia (a subnormal number of sperm) or azoospermia (the absence of sperm)…
- Vascular endothelial growth factor (VEGF) A substance made by cells that stimulates new blood vessel formation, a mitogen for vascular endothelial…
- Contraceptive, pill Commonly called 'the pill,' combined oral contraceptives are the most commonly used form of reversible birth…
- Magnesium sulfate A remarkably versatile compound administered intramuscularly and intravenously as an anticonvulsant and as a…
- Consumption An old and once common term for wasting away of the body, particularly from pulmonary tuberculosis (TB)…
- Open cholecystectomy Cholecystectomy: Surgery in which the abdomen is opened to permit cholecystectomy -- removal of the…
- Tumor, islet cell See: Islet cell cancer
- Radiation therapy, stereotactic The use of a number of precisely aimed beams of ionizing radiation, each coming from different directions and…
- COL2A1 The gene responsible for the production of the alpha1(II) chain of type II collagen. Mutations in the COL2A1…
- Test, syphilis (RPR) Rapid plasma reagin, a blood test for syphilis that looks for an antibody that is present in the bloodstream…
- Clot-dissolving medication See: Thrombolytic agent