HADATH

passing of wind.

Hadath-Akbar, something that requires wudhu or ghusl for ritual cleansing. see ABLUTIONS
Hadath-Asghar, a minor hadath that requires wudhu for ritual cleansing. see ABLUTIONS
angels intercede if at praying place and does not do hadath,
* Narrated Abu Huraira: Allah's Apostle said, "The angels keep on asking for Allah's Blessing and Forgiveness for anyone of you as long as he is at his Musalla (praying place) and does not do Hadath (passes wind). The angels say, 'O Allah! Forgive him and be Merciful to him.' Each one of you is in the prayer as long as he is waiting for the prayer and nothing but the prayer detains him from going to his family." (Sahih Bukhari 1.629, also Sahih Bukhari 1.137, Sahih Bukhari 1.436, Sahih Bukhari 9.86