ˈvermetidZool. [ad.mod.L. Vermetid-æ, f. L. vermes vermes.] An individual of the family Vermetidæ of holostomatous gasteropods. [1860P. P. Carpenter in Rep. Smithsonian Instit. 1859 205 The Vermetidæ (worm shells).]Ibid.Some of the Vermetids assume a looseness of growth as great as that of the worm.