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.
Potentate has been wielding its power in English since the 15th century. It comes from the Late Latin potentatus, which in turn was formed from the Latin potent-, meaning powerful..