There is one common abbreviation of part: prt. If you want to make it plural, simply add on an “s.” 1 When to Use This Abbreviation.Click to see full answer. Correspondingly, does PT mean part? pt noun [C] (PART) written abbreviation for part, when referring to a part of a document: See pt 3 for further details.Also, what does PRT mean? Investment problems usually involve simple annual interest (as opposed to compounded interest), using the interest formula I = Prt, where I stands for the interest on the original investment, P stands for the amount of the original investment (called the “principal”), r is the interest rate (expressed in decimal form), Also to know, is PT short for point? pt is a written abbreviation for pint. pt is the written abbreviation for point.What is the full form of PT 1?also pt. Word forms: plural ptslanguage note: The plural in meaning [sense 1] is either pt or pts. 1. pt is a written abbreviation for pint.