— trilobitic /truy'leuh bit"ik/ , adj.
/truy"leuh buyt'/ , 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).
[ 1825-35; Trilobites , equiv. to Gk trílob ( os ) three-lobed (see TRI-, LOBE) + -ites -ITE 1 ]