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n. pl. men·stru·ums or men·stru·a (-stro͞o-ə)
A solvent, especially one used in extracting compounds from the tissues of organisms.

[Middle English, menstruation, from Medieval Latin mēnstruum, sing. of Latin mēnstrua, menses; see menstruate.]


n, pl -struums or -strua (-strʊə)
1. (Pharmacology) a solvent, esp one used in the preparation of a drug
2. (Pharmacology) a solid formulation of a drug
[C17 (meaning: solvent), C14 (menstrual discharge): from Medieval Latin, from Latin mēnstruus monthly, from mēnsis month; from an alchemical comparison between a base metal being transmuted into gold and the supposed action of the menses]


(ˈsɒl vənt)

1. able to pay all just debts.
2. having the power of dissolving; causing solution.
3. a substance that dissolves another to form a solution: Water is a solvent for sugar.
4. something that solves or explains.
[1620–30; < Latin solvent-, s. of solvēns, present participle of solvere to loosen. See solve, -ent]
sol′vent•ly, adv.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.menstruum - (archaic) a solvent
archaicism, archaism - the use of an archaic expression
dissolvent, dissolver, dissolving agent, resolvent, solvent - a liquid substance capable of dissolving other substances; "the solvent does not change its state in forming a solution"
2.menstruum - the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopausemenstruum - the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause; "the women were sickly and subject to excessive menstruation"; "a woman does not take the gout unless her menses be stopped"--Hippocrates; "the semen begins to appear in males and to be emitted at the same time of life that the catamenia begin to flow in females"--Aristotle
expelling, discharge, emission - any of several bodily processes by which substances go out of the body; "the discharge of pus"
hypermenorrhea, menorrhagia - abnormally heavy or prolonged menstruation; can be a symptom of uterine tumors and can lead to anemia if prolonged
oligomenorrhea - abnormally light or infrequent menstruation
References in classic literature ?
But Ikey was timid, and his hopes remained insoluble in the menstruum of his backwardness and fears.
Water dissolves wood and iron and salt; air dissolves water; electric fire dissolves air, but the intellect dissolves fire, gravity, laws, method, and the subtlest unnamed relations of nature in its resistless menstruum.
AAAID is planning to implement a project on oil extraction through the chemical menstruum at a cost of $ 2.