flatworm. see Platyhelminthes Platyhelminthes, phylum containing about 20,000 species of soft-bodied, bilaterally symmetrical, invertebrate animals, commonly called flatworms.There are four classes: the free-living, primarily aquatic class, Turbellaria, and Trematoda, Cestoda, and Monogenea, which are.....ee Platyhelminthes Platyhelminthes, phylum containing about 20,000 species of soft-bodied, bilaterally symmetrical, invertebrate animals, commonly called flatworms.
Freebase(0.00 / 0 votes)Rate this definition: Pro rata. Pro rata is an adverb or adjective, meaning in proportion. The term is used in many legal and economic contexts. It is sometimes spelled pro-rata, but this is technically a misspelling of the Latin phrase. In North American English this term has been vernacularized to prorated.
Calculation. To arrive at your pro rata salary, you must know what the job pays on a full-time basis, what your employer views as full-time hours, the number of weeks you will be working during the year and your required work hours per week.alculation. To arrive at your pro rata salary, you must know what the job pays on a full-time basis, what your employer views as full-time hours, the number of weeks you will be working during the year and your required work hours per week.