1. breaking down complex molecules into simpler ones to release energy
Usage: biology; present participle of catabolize

Examples

• The body is catabolizing stored fat during the fast.
• Muscle tissue begins catabolizing protein when glucose is unavailable.
• The bacteria are catabolizing organic compounds in the soil.
• During exercise, cells start catabolizing glycogen for quick energy.
• The liver is catabolizing alcohol to remove it from the bloodstream.
• Cancer cells are rapidly catabolizing nutrients from surrounding tissue.