pre·men·stru·al 
(prē-mĕnstr-əl)
(prē-mĕnstr-əl)adj.
Of, relating to, or occurring in the period just before menstruation.
pre·menstru·al·ly adv.
- pentaquark
- pentarchical
- pentarchy
- pentastich
- pentastome
- pentastomid
- Pentateuch
- Pentateuchal
- pentathlete
- pentathlon
- pentatonic
- pentavalent
- pentazocine
- Pentecost
- Pentecostal
- Pentecostalism
- Pentecostalist
- Pentelicon
- Pentelikon
- penthouse
- pentimento
- Pentland Firth
- pentlandite
- pentobarbital sodium
- pentobarbitone