What is the meaning of Menstruum?

The menses; menstrual discharge.

A solvent.

Any liquid medium

a monthly payment

a monthly term of office or service

menstrual discharge

inflection of mēnstruus:

  1. nominative/accusative/vocative neuter singular
  2. accusative masculine singular

nominative/accusative/vocative neuter singular

accusative masculine singular

Source: wiktionary.org