1) Discharge 2) Emission 3) Expelling 
occurring before menstruation.
<gynaecology, physiology> Occurring before menstruation. ... (18 Nov 1997) ... 
(pre-men´stroo-әl) preceding menstruation.
Type: Term Pronunciation: prē-men′strū-ăl Definitions: 1. Relating to the period of time preceding menstruation.
Premenstrual: Just before the start of menstruation. As in a premenstrual headache.
The time period that occurs during a female's menstrual cycle prior to the beginning of menstruation. Premenstural syndromes are common during this time. Narrower term(s): Premenstrual Cycle
[adj] - of or relating to or occurring during the period just before menstruation
premenstrual Occurring before menstruation.
adjective of or relating to or occurring during the period just before menstruation