trilobiticadj.
/ˌtrʌɪlə(ʊ)ˈbɪtɪk/, /ˌtrɪlə(ʊ)ˈbɪtɪk/, U.S. /ˌtraɪləˈbɪdɪk/, /ˌtrɪləˈbɪdɪk/ Chiefly Palaeontology.
Of, relating to, or containing trilobites. Also figurative.
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the world > animals > invertebrates > phylum Arthropoda > trilobites > [adjective]
trilobitic1837
1837 Mag. Nat. Hist. 1 163 In the coralline crag of Suffolk, several species of Chiton are found; but this genus is certainly unknown in the trilobitic limestones of this country.
1872 W. S. Symonds Rec. Rocks iii. 51 The absence of the trilobitic genus, Olenus, from the Menevian group.
1894 Amer. Naturalist 28 756 Prof. Hall recognized and tentatively separated three horizons of the trilobitic beds of Wisconsin and Minnesota.
1957 Jrnl. Paleontol. 31 633/1 On the north side of Wherrets Lookout, cutting Karmberg's Track, are outcrops of limestone with Maclurites and Girvanella..overlain by a dolomitic trilobitic limestone.
1991 N. Baker U & I vi. 91 Because I'd gotten a trilobitic score on the Logic and Reasoning section of the GRE trivium?
2003 A. H. Knoll Life on Young Planet (2005) 244 Life's history is a gripping saga of cyanobacterial survival, a cautionary tale of trilobitic fall.
This entry has been updated (OED Third Edition, September 2009; most recently modified version published online March 2022).
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adj.1837