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.
- 100% free
- No registration
- No intrusive ads
- Privacy by design
- Mobile friendly
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).
Undifferentiated cancer
Cancer: A cancer in which the cells are very immature and 'primitive' and do not look like cells in the tissue from it arose. As a rule, an undifferentiated cancer is more malignant than a cancer of that type which is well differentiated…
Read the definitionRandom terms
Show more- Branchial cleft cyst Also called a branchial cyst, this is a cavity that is a remnant from embryologic development present at…
- Oral cancer Oral cancer: Cancer within the mouth.
- Rehabilitation The process of restoration of skills by a person who has had an illness or injury so as to regain maximum…
- Epidemic hemorrhagic fever A number of diseases characterized by an abrupt onset of high fever and chills, headache, cold and cough, and…
- Metrorrhagia Uterine bleeding at irregular intervals, particularly between the expected menstrual periods. Metrorrhagia…
- Memory, implicit See: Implicit memory
- Nurse practitioner A registered nurse (RN) who has completed an advanced training program in a medical specialty such as…
- Beta blocker A class of drugs that block beta-adrenergic substances such as adrenaline (epinephrine) in the 'sympathetic'…
- Antidiabetic agent A substance that helps a person with diabetes control their level of glucose (sugar) in the blood…
- Chemoprevention The use of natural or laboratory-made substances to prevent a disease such as cancer. The regular use of…
- Folic acid One of the B vitamins that is a key factor in the synthesis (the making) of nucleic acid (DNA and RNA). A…
- Psychiatric trauma An experience that is emotionally painful, distressful, or shocking and which may result in lasting mental…