menstruation

[men-stroo-ey-shuh n, -strey-] /ˌmɛn struˈeɪ ʃən, -ˈstreɪ-/
noun
1.
the periodic discharge of blood and mucosal tissue from the uterus, occurring approximately monthly from puberty to menopause in nonpregnant women and females of other primate species.
2.
the period of menstruating.
Origin
1770-80; menstruate + -ion
Examples from the web for menstruation
  • As nutrition and living conditions improved, the age at first menstruation occurred two to three months earlier each decade.
  • Abdominal pain that occurs during menstruation may be from menstrual cramps or it may indicate a problem in a reproductive organ.
  • After menstruation starts, the ovaries begin to produce and release eggs, which have been stored in the ovaries since birth.
  • Sometimes, adjusting medications in anticipation of menstruation may help prevent attacks.
British Dictionary definitions for menstruation

menstruation

/ˌmɛnstrʊˈeɪʃən/
noun
1.
the approximately monthly discharge of blood and cellular debris from the uterus by nonpregnant women from puberty to the menopause Also called menses Nontechnical name period
Derived Forms
menstruous (ˈmɛnstrʊəs) adjective
Word Origin and History for menstruation
n.

1680s, from Late Latin menstruare, from menstruus "monthly" (see menstrual) + -ation. Old English equivalent was monaðblot "month-blood." Middle English had menstrue (n.), late 14c., from Old French menstrue, from Latin menstruum.

menstruation in Medicine

menstruation men·stru·a·tion (měn'strōō-ā'shən)
n.
The process or an instance of discharging the menses.

menstruation in Science
menstruation
  (měn'str-ā'shən)   
The monthly flow of blood from the uterus beginning at puberty in girls and other female primates. Also called menses. See also menstrual cycle.
menstruation in Culture
menstruation [(men-strooh-ay-shuhn)]

The periodic discharge of the blood-enriched lining of the uterus through the vagina. Menstruation marks the end of one menstrual cycle and the beginning of another.