1. Plural of megatherium; large extinct ground sloths of the Pleistocene epoch, native to South America.
Usage: paleontology; plural form; often capitalized when referring to the genus Megatherium

Examples

• Megatheres were among the largest land mammals to ever exist.
• Fossil remains of megatheres have been discovered throughout South America.
• Scientists study megatheres to understand the megafauna of the Pleistocene.
• The extinction of megatheres occurred thousands of years ago.
• Museum exhibits often feature skeletal reconstructions of megatheres.