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).
Cell, helper
A type of T cell that participates in the immune response by recognizing foreign antigens and secreting substances called cytokines that activate T and B cells. Helper cells fall into two main classes: those that activate other T cells to…
Read the definitionRandom terms
Show more- Dendritic cell A special type of cell that is a key regulator of the immune system, acting as a professional…
- Immunization, H. flu This immunization is designed to prevent disease due to Haemophilus influenzae (H. flu), specifically…
- Disease, chronic wasting See Chronic wasting disease
- Nephrotic syndrome, minimal change See: Minimal change disease
- Mastectomy A general term for removal of the breast, usually to remove cancerous tissue. The operation can be done in a…
- Molluscacide An agent capable of killing snails and other mollusks or of controlling their growth
- Single palmar flexion line Simian crease
- Evolutionarily conserved sequence A base sequence in a DNA molecule (or an amino acid sequence in a protein) that has remained largely…
- Ocular histoplasmosis syndrome An eye disease that is a leading cause of vision loss, due to the spread of spores of the fungus Histoplasma…
- Inferolateral Below and to one side. Both inferior and lateral. In anatomy, there are many such compound terms. For a more…
- Intraepithelial Within the layer of cells that forms the surface or lining of an organ
- Gastric Having to do with the stomach