trilobite

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tri·lo·bite

T0358900 (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.

trilobite

(ˈtraɪləˌbaɪt) n (Palaeontology) any extinct marine arthropod of the group Trilobita, abundant in Palaeozoic times, having a segmented exoskeleton divided into three parts[C19: from New Latin Trilobītēs, from Greek trilobos having three lobes; see tri-, lobe] trilobitic adj

tri•lo•bite

(ˈtraɪ ləˌbaɪt)

n. any marine arthropod of the extinct class Trilobita, from the Paleozoic Era, having a flattened oval body in three vertical segments. [1825–35; < New Latin Trilobites= Greek trílob(os) three-lobed (see tri-, lobe) + -ītēs -ite¹] tri`lo•bit′ic (-ˈbɪt ɪk) adj.

tri·lo·bite

(trī′lə-bīt′) Any of numerous extinct and mostly small arthropods that lived during the Paleozoic Era. Trilobites had a hard outer covering divided into three lengthwise and three widthwise sections. Horseshoe crabs are considered to be their closest living relatives.

Thesaurus

Noun

trilobite - an extinct arthropod that was abundant in Paleozoic times; had an exoskeleton divided into three partsarthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin

Translations

трилобит

trilobite

(trī`ləbīt'), subphylum of the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
..... Click the link for more information. that includes a large group of extinct marine animals that were abundant in the Paleozoic era. They represent more than half of the known fossils from the Cambrian period. The trilobite body was generally oval and flat and was divided into three roughly equal sections: the head, thorax, and tail. The name trilobite refers to a pair of furrows along the length of the animal that divided the body into three longitudinal regions. The body was covered by a mineralized shell. Because the dorsal, or upper, shell was thicker than the under shell, it has been the part best preserved in fossil form. Trilobites were abundant inhabitants of the Cambrian and Ordovician geological periods. They declined thereafter, possibly because they became food for cephalopods and later for fish, and became extinct in the Permian period. Trilobites are most closely related to the chelicerates, which include the horseshoe crabs and spiders.

Bibliography

See R. Fortey, Trilobite! Eyewitness to Evolution (2000).

trilobite

any extinct marine arthropod of the group Trilobita, abundant in Palaeozoic times, having a segmented exoskeleton divided into three parts

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tri•lo•bite

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Bibliography

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Words related to trilobite

noun an extinct arthropod that was abundant in Paleozoic times

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