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.
Freebase(0.00 / 0 votes)Rate this definition: Perilla frutescens. Perilla frutescens Britt. is a cultivated plant of the mint family Lamiaceae. It is the species identification encompassing two distinct varieties of traditional crop in East Asia: â P. frutescens var. crispa, the aromatic leafy herb called by its Japanese name shiso, which in turn is a loan word from the Chinese: ç´«è; pinyin: zi-su; WadeâGiles: tsu-su.