Medical glossary & resources
Understand medical terms and explore authoritative references. Educational only — not a substitute for professional diagnosis or emergency care.
Emergency numbers by country
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Verify numbers locally before travel. In an emergency, call immediately.
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- United Arab Emirates General 999 · Ambulance 998 · Police 999
- Pakistan General 1122 · Ambulance 115 · Police 15
- Saudi Arabia General 911 · Ambulance 997 · Police 999
- India General 112 · Ambulance 102 · Police 100
- United Kingdom General 999 · Ambulance 999 · Police 999
- United States General 911 · Ambulance 911 · Police 911
- Canada General 911 · Ambulance 911 · Police 911
- Australia General 000 · Ambulance 000 · Police 000
- Germany General 112 · Ambulance 112 · Police 110
- France General 112 · Ambulance 15 · Police 17
- Qatar General 999 · Ambulance 999 · Police 999
- Kuwait General 112 · Ambulance 112 · Police 112
- Bahrain General 999 · Ambulance 999 · Police 999
- Oman General 9999 · Ambulance 9999 · Police 9999
- Turkey General 112 · Ambulance 112 · Police 155
- Egypt General 123 · Ambulance 123 · Police 122
- Malaysia General 999 · Ambulance 999 · Police 999
- Singapore General 995 · Ambulance 995 · Police 999
- Bangladesh General 999 · Ambulance 999 · Police 999
- Nigeria General 112 · Ambulance 112 · Police 112
- South Africa General 112 · Ambulance 10177 · Police 10111
Medical dictionaries
- MedlinePlus Medical Encyclopedia U.S. National Library of Medicine Trusted definitions of diseases, symptoms, tests, and treatments.
- Merriam-Webster Medical Dictionary Merriam-Webster Clear definitions of medical terms for patients and students.
- Understanding Medical Words (Tutorial) MedlinePlus Free tutorial on prefixes, roots, and suffixes in medical language.
Reference & health topics
- Merck Manual (Consumer Version) Merck & Co. Symptoms, diagnosis, and treatment overviews for the public.
- WHO Health Topics World Health Organization Global guidance on diseases, wellness, and health systems.
- OpenMD Medical Search OpenMD Search medical literature and terminology across sources.
Medical travel
- WHO International Travel & Health WHO Health advice for international travellers.
- CDC Travelers' Health U.S. CDC Vaccines, outbreaks, and destination-specific health notices.
Common word parts
Hyper-
High, excessive (e.g. hypertension)
Hypo-
Low, deficient (e.g. hypoglycemia)
Cardio-
Heart (e.g. cardiology)
Neuro-
Nerves / nervous system
Derma-
Skin (e.g. dermatology)
Gastro-
Stomach / digestive tract
Hema- / Hemo-
Blood
Osteo-
Bones
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