Dictionary
tri•lo•bite
Pronunciation: (trī'lu-bīt"), [key]—
n.
any marine arthropod of the extinct class Trilobita, from the Paleozoic Era, having a flattened, oval body varying in length from 1 in. (2.5 cm) or less to 2 ft. (61 cm).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.