Share this entry

menstruum Line breaks: men|struum
Pronunciation: /ˈmɛnstrʊəm/

Definition of menstruum in English:

noun (plural menstrua ˈmɛnstrʊə)

1 [mass noun] Menses.
Example sentences
  • The viability of menstrual endometrial tissue in peritoneal fluid (PF) was evaluated and the morphologic changes in the mesothelial cells were studied by in vitro cocultures of menstruum with mesothelial cell monolayers.
2 archaic A solvent.
Example sentences
  • Through the menstrua gold does not acquire any other virtues than those it already has.
  • Let me say that again, there is an alchemical menstruum, that is completely plant based, which indeed can be made from any plant put through the alchemical process.


Late Middle English (in sense 1): from Latin, neuter of menstruus 'monthly', from mensis 'month'. sense 2 is by analogy of the supposed agency of a solvent in the transmutation of metals into gold with the supposed action of menses on the ovum.

Definition of menstruum in:

Share this entry


What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day confidant
Pronunciation: ˈkɒnfɪdant
a person with whom one shares a secret...