Definition of trilobite
: any of numerous extinct Paleozoic marine arthropods (group Trilobita) having the segments of the body divided by furrows on the dorsal surface into three lobes
Recent Examples of trilobite from the Web
Ancient creatures such as trilobites and brachiopods could not cope with the changes, and many of them went extinct.
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Origin and Etymology of trilobite
ultimately from Greek trilobos three-lobed, from tri- + lobos lobe
First Known Use: 1832
Learn More about trilobite
Britannica.com: Encyclopedia article about trilobite
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