dividers
1. The draftsman's instrument used in bookbinding
for a variety of purposes, including measuring the
distance between bands or webbings and cutting
stock, patterns, etc. 2. The heavy sheets of
cardboard or paper, frequently of cover-paper
weight or heavier, used to divide the sections of
a book when two or more sections. parts, or issues
are bound together. (264 , 274 )