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).
Lens
The transparent structure inside the eye that focuses light rays onto the retina (the nerve layer that lines the back of the eye, senses light and creates impulses that go through the optic nerve to the brain). The lens was named after the…
Read the definitionRandom terms
Show more- Immunodeficient Lacking immunity and so susceptible to infection.
- Dieldrix Trade name of the insecticide dieldrin. See: Aldrin and dieldrin
- Blunted affect See: Flat affect
- Kubler-Ross See: Kübler-Ross, Elisabeth
- Glans penis, inflammation of the Inflammation of the rounded head (the glans) of the penis is called balanitis. In the uncircumcised male…
- Barotrauma, sinus See: Sinus barotrauma
- Ambient Surrounding, present on all sides; encompassing. As, the ambient noise is deafening, or the ambient light is…
- Botulinum toxin A toxin produced by the bacterium Clostridium botulinum that is the most poisonous biological substance…
- Insertion Chromosome abnormality due to insertion of a segment from one chromosome into another chromosome.
- Oligonucleotide A small DNA molecule composed of a few nucleotide bases. The term 'oligonucleotide' applies similarly to RNA
- Piriformis muscle A muscle that begins at the front surface of the sacrum (the V-shaped bone between the buttocks at the base…
- Fever, breakbone An acute mosquito-borne viral illness of sudden onset that usually follows a benign course with headache…