1) Polystyrene latex 
[rifle] The PSL (Puşcă Semiautomată cu Lunetă model 1974, `scoped semi-automatic rifle`) is a Romanian military designated marksman rifle. It is also called PSL-54C, Romak III, FPK, FPK Dragunov and SSG-97 (Scharfschützengewehr - 1997). Though similar in appearance to the SVD Dragunov, the PSL rifle is actually based on the RPK light m...
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acronym: polystyrene latex
An abbreviation for parallel slalom, an event which debuted at the 2014 Olympics but is no longer on the program. Parallel slalom is still contested on the World Cup circuit.