Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of or relating to menstruation.
  • adj. Taking place on a monthly basis.
  • adj. Lasting for one month.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Of or relating to the menses.
  • adj. Occurring once a month.
  • adj. Lasting for a month.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Recurring once a month; monthly; gone through in a month; ; pertaining to monthly changes.
  • adj. Of or pertaining to the menses
  • adj. Of or pertaining to a menstruum.

from The Century Dictionary and Cyclopedia

  • Recurring once a month; monthly; gonethrough or completedin a month; specifically, in astronomy, making a complete cycle of changes in a month; pertaining to changes of position recurring monthly: as, the menstrual equation of the sun's place
  • Pertaining to the menses of females; menstruous; catamenial: as, the menstrual flux or flow.
  • In botany, same as menstruous, 3.
  • Pertaining to a menstruum.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. of or relating to menstruation or the menses

Etymologies

Middle English, from Old French menstruel, from Latin mēnstruālis, from mēnstruus, menstrual, from mēnsis, month; see mē-2 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English menstruall, from Latin menstrualis, from menstrua ("menses"), from neuter plural of menstruus ("of a month, monthly, of menstruation"), from mensis ("month") + -alis ("-al"); see moon. (Wiktionary)

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