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Definition of trilobite

trilobite

/ˈtraɪləbaɪt/
tri · lo · bite
Plural:trilobites
•
Adjective:trilobitic
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trilobite Lexical Profile

trilobite Game Scores & Validity

• noun

1

An extinct marine arthropod of the class Trilobita, characterized by a segmented, oval-shaped exoskeleton divided longitudinally into three distinct lobes, which lived abundantly throughout the Paleozoic era.

Example

"Paleontologists carefully excavated a perfectly preserved trilobite from the Cambrian shale."

Synonyms
View all synonyms for trilobite

• Nearby Words

triglav
triller
trillium
trilobite
trim
trimix
trincomalee blind snake

Word Origin & Etymology

Derived from Modern Latin 'Trilobita' (coined in 1771), literally meaning 'three-lobed', from the prefix 'tri-' (three), Greek 'lobos' (lobe), and the suffix '-ite' (used for fossils and minerals).

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Trilobite. In Wordmom Dictionary. Retrieved Oct 15, 2026, from https://wordmom.com/dictionary/trilobite
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