a. [ad. mod.L. spiriformis or F. spiriforme.] Having the form of a spire or spiral.
1841. T. R. Jones, Anim. Kingd., 450. In all essential particulars this spiriform viscus is precisely analogous to the laminated cavity of the Nautilus.
1861. Hulme, trans. Moquin-Tandon, II. VII. iii. 349. The females [of the Trichocephalus] … are always straight; never spiriform, like the males.
1892. F. Galton, Finger Prints, v. 77. A series of rings, spirals, and plaits … breaking away into a more or less spiriform arrangement.
