יְדִיעָה, (יָדַע) knowledge, esp. (Lev. IV, 14; 23; 28) finding out, discovery, consciousness. Shebu. 5ᵃ, a. e. יְרִיעַת בית רבו שמה י׳ the knowledge acquired in the teacher’s house (a theoretical knowledge that one who touches an unclean thing becomes unclean &c.) is also called a knowledge (as regards the applicability of the verb נעלם). Ker. IV, 2 אם היתה י׳ בנתיים if there was consciousness between the two acts (if he found out his first transgression before committing the second). Shebu. I, 2 י׳ בתחלה וי׳ בסוף והעלם בנתיים original consciousness (knowing that he became unclean) and final consciousness (finding out that he had eaten sacred things in uncleanness) but forgetfulness between. Hor. 2ᵃ, a. fr. השב מִידִיעָתוֹ he who regrets when he finds out his transgression; a. fr.—Pl. יְדִיעוֹת. Sheb. I, 1 י׳ הטומאה the laws concerning the discovery of having sinned through uncleanness; ib. II, 1; a. fr.