Gastrointestinal⭐⭐ Common
Odynophagia
/oh-din-oh-FAY-jee-uh/Simple Meaning:
Severe, painful swallowing.
Pain experienced during deglutition, commonly caused by esophageal ulceration, candidiasis, or severe pharyngitis.
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 3 Medical Terms (Letter "O")Reset Filters
Cardiovascular⭐⭐ Common
Orthopnea
/or-THOP-nee-uh/Simple Meaning:
Difficulty breathing when lying flat.
Dyspnea occurring in recumbent position, relieved by sitting upright, characteristic of left-sided heart failure.
Respiratory⭐⭐⭐ Very Common
Oxygen Saturation
/OK-sih-juhn sach-uh-RAY-shuhn/Simple Meaning:
Percentage of hemoglobin carrying oxygen (SpO2).
Vital sign indicating arterial blood oxygen content measured non-invasively by pulse oximetry (normal range: 95–100%).
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