Zool. [ad. mod.L. Turritellid-æ pl., f. Turritella (Lamarck, 1799), name of the typical genus, f. turris tower; see -ID3.] A gastropod of the family Turritellidæ, characterized by long turreted shells with spiral striations; a screw-shell. So Turritelloid a. [-OID], resembling a screw-shell; having the characters of the Turritellidæ.
1860. P. P. Carpenter, in Rop. Smithsonian Instit., 1859, 206. The Turritelloid worm-shells. Ibid. (1861), 1860, 210. The shells of Siphonium, though spiral at birth, have no Turritelloid portion.
1895. Funk’s Standard Dict., Turritellid.
