rachiglossate

Century Dictionary and Cyclopedia

1. In Mollusca, having upon the lingual ribbon or radula only a single median tooth, or a median tooth with only an admedian one on each side of it, in any one of the many transverse series or cross-rows of radular teeth. The formula is 0-I-0 or I-I-I, where the 0 is a cipher and I means one.