Niddah נידה Tulmud

Niddah (or nidah; Hebrew: נִדָּה‎‎) is a Hebrew term describing a woman during menstruation, or a woman who has menstruated, and not yet completed the associated requirement of immersion in a mikveh (ritual bath). Niddah (or nidah; Hebrew: Ndh) is a Hebrew term describing a woman during menstruation, or a woman who has menstruated, and not yet completed the associated requirement of immersion in a mikveh (ritual bath).