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).
C4 (cervical vertebra)
The fourth cervical (neck) vertebra from the top
Read the definitionRandom terms
Show more- Nerve, third cranial The third cranial nerve is the oculomotor nerve. The cranial nerves emerge from or enter the skull (the…
- Interleukin-2 A type of interleukin, a chemical messenger, a substance that can improve the body's response to disease. It…
- Principal investigator In biomedical research, the person who directs a research project or program. The principal investigator (the…
- Immunotoxin A hybrid molecule created by coupling an antibody or antigen with part or all of a toxin. The hybrid molecule…
- Baby blues A common temporary psychological state right after childbirth when a new mother may have sudden mood swings…
- Lymphadenopathy Abnormally enlarged lymph nodes. Commonly called 'swollen glands.' The term 'lymphadenopathy' is not as tough…
- Vaccination, yellow fever A live attenuated (weakened) viral vaccine that is recommended for people traveling to or living in tropical…
- Agammaglobulinemia Total or near-total absence of gamma globulin, a protein fraction of the blood rich in antibodies, due to…
- Womb The womb (uterus) is a hollow, pear-shaped organ located in a woman's lower abdomen between the bladder and…
- Nerve, oculomotor The oculomotor nerve is the third cranial nerve. (The cranial nerves emerge from or enter the cranium, the…
- Auditory cortex The part of the brain that is concerned with hearing. The auditory cortex is the temporal lobe, which the…
- Macrovascular Pertaining to the macrovasculature, the portion of the vasculature of the body comprising the larger vessels…