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).
Withdrawal, penis
A method of contraception, also called coitus interruptus, in which the man withdraws his penis from the vagina before ejaculation. Fertilization is prevented because the sperm do not enter the vagina. The effectiveness of this maneuver…
Read the definitionRandom terms
Show more- Eyelids, congenital ptosis of the Drooping of the upper eyelids at birth. The lids may droop only slightly or they may cover the pupils and…
- Virus, pox See: Orthopox
- Dialectical behavioral therapy A mode of treatment designed for people with borderline personality disorder (BPD), particularly those with…
- Immunocow A cow that has been genetically engineered to produce human antibodies. An immunocow, when challenged with an…
- Retromingent Urinating backwards. Also an animal such as a raccoon that urinates backwards. As in: 'You have revealed…
- Spermatogenesis The process of sperm formation. The term was created from the prefix 'spermato-' (Greek sperma, the seed or…
- Sac, yolk See: Yolk sac
- Pseudodementia A severe form of depression resulting from a progressive brain disorder in which cognitive changes mimic…
- Meniscus The word 'meniscus' comes from the Greek and refers to a crescent-shaped structure. Today a meniscus is…
- Neural foramen See: Intervertebral foramen
- Trisomy The presence of three copies of a chromosome rather than the normal two. The most common trisomies in…
- Tooth, cracked, syndrome A toothache caused by a broken tooth (tooth fracture) without associated cavity or advanced gum disease…