menstrual

Etymology

From Middle English menstruall, from Latin mēnstruālis, from mēnstrua (“menses”), from neuter plural of mēnstruus (“of a month, monthly, of menstruation”), from mēnsis (“month”) + -ālis (“-al”); see moon.

adj

1. Of or relating to the menses.
   Recent studies in physiology have noted that women who live in close proximity to one another - nurses in a hospital or coeds in a college dormitory - tend to have their menstrual periods at the same time. 1981, William Irwin Thompson, The Time Falling Bodies Take to Light: Mythology, Sexuality and the Origins of Culture, London: Rider/Hutchinson & Co., page 96
2. (dated) Occurring once a month; monthly.
3. (dated) Lasting for a month.
   a menstrual flower

noun

1. (colloquial) A menstrual period.
   “All that drama for what” I thought. All she had to do was tell me that I was having my menstrual. So much for band aids. 2012, Miryom Willis, Shirley Fisher, Trials, Tragedy, Triumphs, page 11