Used Occasionally. protozoa is one of the 30000 most commonly used words in the Collins dictionary.
It is a species of hardy deciduous flowering shrub in the genus Dasiphora (formerly Potentilla) of the family Rosaceae, native to the cool temperate and subarctic regions of the northern hemisphere, often growing at high altitudes in mountains.
Not to be confused with sasparilla and sassafras, which are used to make root beer, sarsaparilla is derived from the bark of a thorny vine native to South America. It is a member of the Smilax species, which includes many tenacious thorny vines from around the world (including our cat brier).