An extinct marine arthropod that occurred abundantly during the Paleozoic era, with a carapace over the forepart, and a segmented hind part divided longitudinally into three lobes.
More example sentences
- These fossils include graptolites, trilobites, and various types of microfossils visible only under the microscope.
- Clearly visible within the imprint were the remains of trilobites, extinct marine arthropods.
- But in fact, there are very distinct patterns found in the fossil record of trilobites.
Definition of trilobite in:
- The British & World English dictionary