noun Pathology.
- absence of the menses.
1804, Modern Latin, from Greek privative prefix a- “not” (see a- (3)) + men “month” (see moon (n.)) + rhein “to flow” (see rheum). Related: amenorrheal.
n.
- Abnormal suppression or absence of menstruation.menostasis
- The absence of menstruation in a woman between puberty and menopause. Some causes include pregnancy, decreased body weight, endocrine and other medical disorders, and certain medications.