trilobite Trilobita • trilobitic · · · Info · Definitions · Characters · · trilobite · · Text Latin · · Script 9 · · Length Definitions · · · (noun) an extinct arthropod that was abundant in Paleozoic times; had an exoskeleton divided into three parts. · · Noun Definition 1 Characters · · b latin small letter b U+0062 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074