trilobite

noun tri·lo·bite \ ˈtrī-lə-ˌbīt \

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

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Origin and Etymology of trilobite

ultimately from Greek trilobos three-lobed, from tri- + lobos lobe


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