1. Of or relating to menstruation or the menses
   - menstrual

See also: catamenia

• 4-hitter
• 4-membered
• 40
• 400
• 400th
• 401-k
• 401-k plan
• 40th
• 41
• 41st
• 42
• 42nd
• 43
• 43rd
• 44
• 440 yards
• 44th
• 45
• 45th
• 46
• 46th
• 47
• 47th
• 48
• 48th