trilobite

noun

Etymology: Borrowed from translingual Trilobita. By surface analysis, tri- (“three”) + lobe + -ite (“mineral, individual”), literally “three-lober”.

1. An extinct arthropod of the class Trilobita, whose body had three large lobes.

   “When you look at a Precambrian trilobite in the lobby of a New York bank, it is difficult to speculate about its primeval environment.”