tricingulate

adj

1. Girdled or banded in three places; marked with three distinct rings, ridges, or encircling bands.

   “Shell conical, imperforate, thin, pale rose colored, upper whorls plane, tricingulate, the upper cingulus beaded, second and third smooth; last whorl obtusely angled, encircled by 5 cinguli; base a little convex, with 6 cinguli; aperture quadrangular; columella a little oblique, cylindrical, scarcely truncate, but sensibly passing into the base.”

   “Primary A increases in strength until about whorl 6 which is strongly tricingulate, but thereafter the rise of the secondary, r, followed by tertiaries, decreases its importance.”

   “The upper whorls are plane, and tricingulate.”