Borrowed from Hebrew פְּסָק (p'sák).
psak (plural piskei)
- A decisive rabbinic ruling on halachic law.
1999 November 2, Yisroel Markov, “Personal Kiddush”, in soc.culture.jewish[1] (Usenet):By the end of the meal one of them remembered a psak that said that women eating together should make a mezumen. They debated it while I looked in the Shulchan Aruch for anything that says so or otherwise.
2004 October 18, mos...@mm.huji.ac.il, “Simple questions (yah, right)”, in soc.culture.jewish.moderated[2] (Usenet):Words like "reasonable to say" and "arguably" betoken a "gut feeling" rather than a clear psak.