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).
Megakaryocyte
A giant cell in the bone marrow that is the ancestor of blood platelets.
Read the definitionRandom terms
Show more- Subcutaneous Under the skin. 'Subcutaneous' implies just under the skin. With a subcutaneous injection, a needle is…
- Cyclospora infection Infection with Cyclospora cayetanensis, a single-celled parasite. The first known human cases of illness…
- Tag, preauricular A common minor anomaly, this is a rudimentary tag of ear tissue. It often contains a core of cartilage. The…
- Scaling Abnormal shedding or accumulation of an upper layer of skin (the stratum corneum)
- Congenital ptosis of the eyelids Drooping of the upper eyelids at birth. The lids may droop only slightly or they may cover the pupils and…
- Onycho- (prefix) Pertaining to the nails. Examples of medical terms involving 'onycho-' include onychodystrophy (abnormal…
- Q.i.d. (on prescription) Seen on a prescription, q.i.d. (or qid) means 4 times a day (from the Latin quater in die). The abbreviation…
- Unconscious 1. Interruption of awareness of oneself and one's surroundings, lack of the ability to notice or respond to…
- Hematoma, subdural See: Subdural hematoma
- Remission induction chemotherapy See Induction therapy
- Vaginal vestibule The vaginal opening is called the vestibule of the vagina. In medicine, a vestibule is a space or cavity at…
- Test, erythropoietin A test of the hormone erythropoietin (EPO) in blood. An abnormal level of EPO may mean bone marrow or kidney…