1. broken down into simpler substances by the action of living organisms such as bacteria
Usage: past participle used as adjective

Examples

• The biodegraded plastic had completely disappeared from the compost pile.
• Scientists studied the biodegraded remains of ancient organic matter.
• The biodegraded waste products enriched the soil naturally.
• After six months, the biodegraded packaging left no harmful residue.
• The biodegraded materials were safely absorbed back into the ecosystem.
• Researchers found that the biodegraded compounds posed no environmental threat.