Origin of P.SS.
From the Latin word postscrīpta
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Examples from the Web for pss
In the Trito-Isaiah during the post-exilian period, and in such psalm literature as Pss.
British Dictionary definitions for pss
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012