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).
Hormone, thyroxine
A chemical substance made by the thyroid gland The thyroid gland uses iodine to make thyroid hormones. Thyroxine (T4), one of the most important thyroid hormones, has four iodine molecules attached to its molecular structure
Read the definitionRandom terms
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- Wax dip A treatment for the symptoms of joint and muscle conditions, such as arthritis, that consists of melted…
- Atrophic vaginitis Thinning of the lining (the endothelium) of the vagina due to decreased production of estrogen. This may…
- Ventricular Pertaining to the ventricles, the lower chambers of the heart, as in ventricular fibrillation and ventricular…
- Mononeuritis multiplex Inflammation of two or more nerves, typically in unrelated portions of the body. Mononeuritis multiplex…
- Bayes' theorem See: Bayes theorem
- Ovarian teratoma Also called a dermoid cyst of the ovary, this is a bizarre tumor, usually benign, in the ovary that typically…
- Naturalistic study A type of study in which the researcher very carefully observes and records some behavior or phenomenon…
- Poland sequence A unique pattern of one-sided malformations characterized by a defect of the chest (pectoralis) muscle on one…
- Paraparesis Weakness of the lower extremities
- Magnesia Named after a town in present day Turkey where an ore containing magnesium carbonate was mined. Milk of…