Cystoliths are structures found in certain plants that contain calcium carbonate. These structures are responsible for many of the unique characteristics of these plants, such as their ability to store water and nutrients. There are several synonyms for the word cystoliths, including bladder stones, lithocysts, and calcareous bodies. All of these terms refer to the same structures found in these plants, but they may be used in different contexts or by different groups of people. Regardless of the synonym used, cystoliths continue to be an important area of research for plant biologists and botanists around the world.