Trilobite (noun)

A type of extinct arthropod that lived from about 521 million to about 252 million years ago, characterized by a three-lobed body structure and hard exoskeleton.

Origin:

Early 18th century, from the new latin word "trilobita," which means "three-lobed.".

Examples:

1. Trilobites are among the most well-known fossils from the Paleozoic era.
2. A trilobite specimen was uncovered in the ancient rock formations of the Grand Canyon.
3. The trilobite's long, segmented body and many legs made it well-suited for life in the ocean.
4. Many scientists study trilobites to gain a better understanding of early life on Earth.
5. The trilobite's complex eyes, composed of hundreds of tiny lenses, were some of the earliest of their kind.