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.
If you earn a pro rata salary for working 25 hours per week, you will work a total of 1,300 hours annually. In this case, your hours worked are equal to 62.5 percent of a full-time employee's hours (1,300/2,800 = .625), so you will earn 62.5 percent of a full-time salary.alculation. To calculate your pro rata salary, you need to know what a full-time employee in your position makes annually, how many hours you will work each week and how many weeks you will work each year.