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).
Melan- (prefix)
Prefix meaning dark or black. It comes from the Greek 'melas', black. Examples of terms containing melan- include melancholia, melanin, melanocytes, melanoma and melena
Read the definitionRandom terms
Show more- Diabetes, non-insulin-dependent Type 2 diabetes. See also Diabetes, type 2.
- Histiocytosis, Langerhans cell Histiocytosis in which the active histiocytes normally occur in the skin. See histiocytosis.
- Proctocele See: Rectocele
- Auricle 1. The principal projecting part of the ear. Also called the pinna.2. Something ear shaped such as the upper…
- Autologous In blood transfusion and transplantation, a situation in which the donor and recipient are the same person…
- Tomograph The apparatus for generating a tomogram, a two-dimensional image of a slice or section through a…
- Span, memory The number of items, usually words or numbers, that a person can retain and recall. Memory span is a test of…
- Gene mapping The process of determining the relative positions of genes on a chromosome (or another piece of DNA) and the…
- Macroglossia Enlarged tongue. Macroglossia is sometimes said to be associated with Down syndrome, but in that disorder the…
- Chromosome 5q- syndrome A blood disorder due to the loss of part of the long (q) arm of chromosome 5 in myeloid (bone marrow) cells…
- Rickettsial diseases The infectious diseases caused by the rickettsiae fall into 4 groups:(1) typhus: epidemic typhus…
- Sinusitis Sinusitis: Sinusitis is inflammation of the lining membrane of any of the hollow areas (sinuses) of the bone…