a. and sb. [ad. mod.L. Lithistida, f. Gr. λίθος stone + ἱστός web: see -ID.] a. sb. A silicious sponge of the group Lithistida, in which the spicules are articulated to form a silicious skeleton. b. adj. Pertaining to or having the character of the Lithistida.
1892. Athenæum, 13 Feb., 218/2. Tetractinellid, lithistid, and hexactinellid spicules are also present.
1894. Geol. Mag., Oct., 467. Lithistid sponges from the Upper Cambrian of the Mingan Islands are better preserved.
