1. of, relating to, or containing many animals or animal forms
Usage: technical; biology
2. of or relating to a geological era or period characterized by abundant animal life
Usage: geology; archaic

Examples

• The polyzoic nature of the fossil bed indicated a thriving ecosystem millions of years ago.
• Polyzoic organisms were distributed throughout the ancient ocean.
• The polyzoic era saw the emergence of diverse animal species.
• Scientists studied the polyzoic composition of the rock layers.