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.
pro rata adjective, adverb. âº âcalculated âaccording to, or as a âshare of, the âfixed ârate for a âlarger âtotal âamount: a âpro rata âpayment/âpay âincrease It's â¬20,000 âpro rata, but I'm doing âhalf the âfull ânumber of âhours, so I'll be getting â¬10,000.