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).
Heterochromatin, facultative
Heterochromatin that need not always be heterochromatic but which has the faculty to return to the normal euchromatic state. The inactive X chromosome is made up of facultative heterochromatin. When a woman transmits that X to a son, it…
Read the definitionRandom terms
Show more- CAD Coronary artery disease. CAD is a major cause of illness and death. It begins when hard cholesterol…
- Dental Association, American (ADA) The mission statement of the ADA reads as follows: 'The ADA is the professional association of dentists…
- Prosthetic Referring to a prosthesis, an artificial substitute or replacement of a part of the body such as a tooth…
- X (drug caution code) Abbreviation on a medication that indicates SOS -- that the medication contains a substance such as…
- Knee, artificial Total knee replacement, a surgical procedure in which damaged parts of the knee joint are replaced with…
- Cryoprobe A surgical probe, a long slender pointed surgical instrument, used to apply extreme cold to tissues. From…
- Microvascular surgery Surgery on very small blood vessels such as those only 3 to 5 millimeters in diameter. Microvascular surgery…
- Asn Asparagine. See also: Amino acid symbols
- Occupational medicine The field of medicine encompassing occupational disease, diseases due to factors in people's occupations. For…
- Trinucleotide A sequence of 3 base pairs; a triplet of bases. The gene code is made up of trinucleotides
- Toxoplasma gondii A single-celled parasite that causes toxoplasmosis (toxo) . Toxoplasma gondii is very common (more than 60…
- Lassa virus The deadly cause of Lassa fever. Lassa virus is a virulent and highly transmissible RNA virus that belongs to…