TRILOBITE - Definition

Pronunciation:		'trIlu`bIt
WordNet Dictionary

	Definition:	[n] an extinct arthropod that was abundant in Palaeozoic times; had an exoskeleton divided into three parts

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	See Also:	arthropod

Products Dictionary

	Definition:	Trilobite A senior paleontologist at the Natural History Museum of London writes warmly about his pet subject--a 500 million year old arthropod called the Trilobite. This former sea-dwelling crustacean-like creature survived 300 million years of climate change and continental drift, but now its closest living relative is the horseshoe crab. Fortey writes enthusiastically as he describes the world from the Trilobite`s point of view. more details ...

Webster's 1913 Dictionary

	Definition:	\Tri"lobite\ (tr[imac]"l[-o]b[imac]t), n. [Cf. F. trilobite. See {Trilobate}.] (Paleon.) Any one of numerous species of extinct arthropods belonging to the order Trilobita. Trilobites were very common in the Silurian and Devonian periods, but became extinct at the close of the Paleozoic. So named from the three lobes usually seen on each segment.