a. and sb. [f. next + -OID.] a. adj. Of or pertaining to or resembling the genus Limulus. b. sb. A limuloid crustacean.
1859. Page, Handbk. Geol. Terms, s.v. Limulus, Several limuloid crustaceans have been discovered in the coal-measures.
1877. Le Conte, Elem. Geol. (1879), 313. In general appearance they [Trilobites] certainly approach Limuloids.
