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).
Ortho- (prefix)
Prefix meaning straight or erect. From the Greek 'orthos' that means just that: straight or erect. Examples of terms involving ortho- include orthodontics (straightening the teeth), orthopaedics (straightening the child), orthopnea…
Read the definitionRandom terms
Show more- Intraperitoneal Within the peritoneal cavity, the area that contains the abdominal organs
- Bone, ethmoid See: Ethmoid bone
- Trochlear nerve The trochlear nerve controls the superior oblique muscle of the eye, one of the extraocular muscles, the…
- Hormone,T4 Thyroxine
- Nephropathy, membranous See: Membranous nephropathy
- Capsaicin A component of certain plants, including cayenne and red pepper, used topically to relieve minor arthritis…
- CM (coccidioidomycosis) A disease due to a fungus called Coccidioides immitis. About 40% of people infected with this fungus develop…
- Calefacient 1. (noun) Anything that warms. 2. (noun) A substance that produces a feeling of warmth when it is applied to…
- Sydenham's chorea See: Sydenham chorea
- Opiate agonist maintenance See: Methadone treatment program
- Patellofemoral syndrome (PFS) Patellofemoral syndrome (PFS): The commonest cause of chronic knee pain, PFS characteristically causes vague…
- Mastectomy, preventative Removal of one or both breasts without the current presence of cancer. This surgery is sometimes chosen as a…