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Clinical & Layman Language Dictionary (Deduplicated A–Z)

Medical Terms & Simple Meanings A–Z

Search over 153+ verified medical terms. Clear layman definitions, clinical explanations, frequency ratings (⭐⭐⭐ Very Common), pronunciations, and body system tags.

Showing 8 Medical Terms (Letter "A")Reset Filters
Pharmacology⭐⭐⭐ Very Common

Analgesic

/an-al-JEE-zik/
Simple Meaning:

A medicine used to relieve or reduce pain (e.g. Paracetamol, Ibuprofen).

Analgesics act on peripheral or central nervous systems to relieve pain without causing loss of consciousness.

Clinical Example: "The doctor prescribed an oral analgesic following the dental procedure."
Gastrointestinal⭐⭐⭐ Very Common

Abdominal Pain

/ab-DOM-i-nuhl payn/
Simple Meaning:

Pain felt in the belly or abdominal cavity.

Discomfort occurring between the chest and pelvic region, originating from organs such as the stomach, intestines, liver, or gallbladder.

Clinical Example: "Acute right lower quadrant abdominal pain may indicate appendicitis."
General Medical⭐⭐⭐ Very Common

Acute

/uh-KYOOT/
Simple Meaning:

Sudden in onset or usually short-term.

Refers to a disease or symptom that develops rapidly and requires prompt evaluation, as opposed to chronic conditions.

Clinical Example: "An acute infection develops over hours to days."
Hematology⭐⭐⭐ Very Common

Anemia

/uh-NEE-mee-uh/
Simple Meaning:

A condition involving low red blood cells or hemoglobin levels.

Reduced oxygen-carrying capacity of blood caused by iron deficiency, vitamin B12 loss, or blood loss, causing fatigue and pallor.

General Medical⭐⭐⭐ Very Common

Anxiety

/ang-ZEYE-ih-tee/
Simple Meaning:

Excessive worry, fear, or nervousness.

A psychological and physiological state characterized by persistent apprehension, somatic tension, and autonomic arousal.

Gastrointestinal⭐⭐⭐ Very Common

Appetite

/AP-ih-tyte/
Simple Meaning:

Desire to eat food.

The physiological and psychological drive to consume food, regulated by the hypothalamus and gastrointestinal hormones.

Cardiovascular⭐⭐⭐ Very Common

Arrhythmia

/uh-RITH-mee-uh/
Simple Meaning:

Abnormal or irregular heart rhythm.

Disruption in the electrical conduction system of the heart, causing beat rates that are too fast (tachycardia), too slow (bradycardia), or irregular.

Emergency⭐⭐⭐ Very Common

Anaphylaxis

/an-uh-fuh-LAK-sis/
Simple Meaning:

Severe, life-threatening allergic reaction.

Rapid-onset systemic IgE-mediated allergic hypersensitivity reaction causing airway edema, bronchospasm, and circulatory collapse.

Clinical Example: "Anaphylaxis requires immediate intramuscular epinephrine."

This information is educational only and does not replace professional medical advice.