menses

[men-seez] /ˈmɛn siz/
noun, (used with a singular or plural verb) Physiology
1.
the periodic flow of blood and mucosal tissue from the uterus; menstrual flow.
Origin
1590-1600; < Latin mēnsēs, plural of mēnsis month

mense

[mens] /mɛns/
noun
1.
propriety; discretion.
verb (used with object), mensed, mensing.
2.
to adorn; bring honor to; grace.
Origin
1490-1500; variant (north) of mensk, Middle English menske courtesy, honor < Old Norse menska humanity, cognate with Old English menniscu literally, the human state; akin to mensch. See man1, -ish1
Related forms
menseful, adjective
menseless, adjective

men's

[menz] /mɛnz/
noun, plural men's.
1.
a range of sizes in even and odd numbers for garments made for men.
2.
a garment in this size range.
3.
the department or section of a store where these garments are sold.
Also, mens.
Origin
men + 's1
Examples from the web for menses
  • If a blood clot blocks the flow of menses through the cervix, retrograde menstruation may be even more likely.
British Dictionary definitions for menses

menses

/ˈmɛnsiːz/
noun (pl) menses
1.
another name for menstruation
2.
the period of time, usually from three to five days, during which menstruation occurs
3.
the matter discharged during menstruation
Word Origin
C16: from Latin, pl of mensis month
Word Origin and History for menses
n.

"monthly discharge of blood from the uterus," 1590s, from Latin menses, plural of mensis "month" (see moon (n.)).

menses in Medicine

menses men·ses (měn'sēz)
n.
The monthly flow of blood and cellular debris from the uterus that begins at puberty and ceases at menopause. Also called emmenia, menstrual period.

menses in Science
menses
  (měn'sēz)   
See menstruation.