|—n , pl -struums, -strua|
|1.||a solvent, esp one used in the preparation of a drug|
|2.||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]|
menstruum men·stru·um (měn'strōō-əm)
n. pl. men·stru·ums or men·stru·a (-strōō-ə)
A solvent, especially one used in extracting compounds from plant and animal tissues and preparing drugs.