Systemic⭐⭐⭐ Very Common
Fatigue
/fuh-TEEG/Simple Meaning:
Unusual tiredness or persistent lack of energy.
Subjective complaint of tiredness, weakness, and exhaustion distinct from normal sleepiness, persisting despite rest.
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 5 Medical Terms (Letter "F")Reset Filters
Systemic⭐⭐⭐ Very Common
Fever
/FEE-ver/Simple Meaning:
Higher-than-normal body temperature (≥ 100.4°F / 38°C).
Hypothalamic set-point elevation mediated by pyrogenic cytokines (IL-1, TNF-alpha) in response to infection or inflammation.
Dermatological⭐⭐ Common
Fissure
/FISH-er/Simple Meaning:
Deep, narrow crack or tear in skin or mucous membrane.
Linear ulceration of mucosal membrane, most commonly occurring in the posterior midline of the anal canal.
Cardiovascular⭐⭐ Common
Flushing
/FLUSH-ing/Simple Meaning:
Sudden redness and warmth of the skin.
Transient erythema of the face, neck, and upper chest resulting from cutaneous vasodilation, emotional stress, or nitrate drugs.
Gastrointestinal⭐⭐ Common
Flatulence
/FLATCH-uh-luhns/Simple Meaning:
Release of intestinal gas through the anus.
Passage of rectal gas consisting of nitrogen, oxygen, carbon dioxide, hydrogen, and methane produced by colonic bacterial fermentation.
This information is educational only and does not replace professional medical advice.