Rotula (disambiguation) explained

A rotula is a roll consisting of a long and narrow strip of writing material wound around a wooden axle or rod and written on its interior side.

Rotula is also the name of several genera of plants and animals:

• Rotula (plant), a genus of plants in the family Boraginaceae
• Rotula (echinoderm), a genus of echinoderms in the family Rotulidae
• Rotula, see List of prehistoric echinoderm genera