1. The act or the time of menstruating.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• menstraution,
• mensturation,
• mentration,
• menstration,
• menstruational,
• construation,
• menustration,
• mentruation,
• menstruationg,
• nenstruation,
• kenstruation,
• jenstruation,
• mwnstruation,
• msnstruation,
• mdnstruation,
• mestruation,
• mensruation,
• mensuration,
• nonstration,
• mestruations

• menstruate,
• menstrual,
• menstruating,
• menstrual cycle,
• menstrual blood,
• menstrual flow,
• Menstruum,
• menstrual phase.

The adjective form of the word "menstruation" is "menstrual".

The plural of the "menstruation" can be the "menstruations".

The singular of the "menstruation" can be the "menstruation".