trilobitic


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tri·lo·bite

 (trī′lə-bīt′)
n.
Any of numerous extinct marine arthropods of the class Trilobita, of the Paleozoic Era, having a segmented body divided by grooves into three longitudinal lobes and found as fossils throughout the world.

[New Latin Trilobītēs, former class name, from Greek trilobos, three-lobed : tri-, tri- + lobos, lobe.]

tri′lo·bit′ic (-bĭt′ĭk) adj.