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).
Metrorrhagia
Uterine bleeding at irregular intervals, particularly between the expected menstrual periods. Metrorrhagia may be a sign of an underlying disorder, such as hormone imbalance, endometriosis, uterine fibroids or, rarely, cancer of the…
Read the definitionRandom terms
Show more- Systole The time period when the heart is contracting. The period specifically during which the left ventricle of the…
- Syndrome, Menkes See: Menkes syndrome
- Tyrosine An amino acid, one of the 20 building blocks of protein. A nonessential amino acid, tyrosine is produced from…
- Dengue Also known as Dengue fever, an acute mosquito-borne viral illness of sudden onset that usually follows a…
- Mortality rate, infant The number of children dying under a year of age divided by the number of live births that year. The infant…
- Vasculitis, retinal Vasculitis, retinal: The retina is the portion of the eye that contains the nerves of sensation that perceive…
- Nondipper A person in whom there is an absence of the normal nocturnal fall (dip) in blood pressure. Nondipper status…
- Radical neck See: Radical neck dissection
- Peripheral nervous system ): That portion of the nervous system that is outside the brain and spinal cord. The peripheral nervous…
- Karyotype, spectral (SKY) Karyotype, spectral (SKY): A visualization of all of the chromosomes in the genome all together with each…
- Carcinoma of the breast, infiltrating ductal Breast, infiltrating ductal: Infiltrating ductal carcinoma is one of several recognized specific patterns of…
- Spitz-Holter valve A pioneering one-way valve created by John Holter to treat hydrocephalus. In 1955 Mr. Holter, , a hydraulics…