<human>:  What is the meaning of the word ‘menstruation’?
<bot>: The word menstruation is a noun. It refers to the menstrual cycle of a female. The menstrual cycle is a recurring pattern of changes in the female reproductive system that leads to the release of eggs from the ovaries. The menstrual cycle is typically completed within a woman’s lifetime, although it may not be completed due to certain health conditions.