"an extinct arthropod that was abundant in Paleozoic times; had an exoskeleton divided into three parts"@en-us . . . . "an extinct arthropod that was abundant in Paleozoic times; had an exoskeleton divided into three parts"@en-us . . "trilobite"@en-us . "0"^^ . . . "101768244"^^ . "101688584"@en-us . . . . "0"^^ . "01768244-n"^^ . "trilobite"^^ .