Menstruous

Men′stru-ous

,

Adj.

[L.

menstruus

, fr.

mensis

month. Cf.

.]

1.

Having the monthly flow or discharge; menstruating.

2.

Of or pertaining to the monthly flow; catamenial.

,

Adj.

[L. menstruus, from mensis, a month.]

1.

Having the monthly flow or discharge; as a female.

2.

Pertaining to the monthly flow of females.

menstruous ‎(not comparable)

Of or pertaining to menstruation; menstrual.
(of a female) Currently undergoing menstruation.
- 1621, Robert Burton, The Anatomy of Melancholy, New York, 2001, p.213:
  Foolish, drunken, or hairbrain women most part bring forth children like unto themslves, morosus et languidos, and so likewise he that lies with a menstruous woman.
(obsolete) Monthly.

“menstruous” in An American Dictionary of the English Language, by Noah Webster, 1828.
menstruous in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
“menstruous” in Dictionary.com Unabridged, v1.0.1, Lexico Publishing Group, 2006.
Oxford English Dictionary, 2nd ed., 1989.