名詞 menstruum:

1. (archaic) a solvent
2. the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause--Aristotle
   同義詞：menstruation, menses, catamenia, period, flow

men.stru.um

n.（名詞）
【復(fù)數(shù)】 men.stru.ums 或 men.stru.a [-strô-…]
A solvent, especially one used in extracting compounds from plant and animal tissues and preparing drugs.
溶媒：一種溶劑，尤指用于從植物和動物組織中提取化合物并制成藥劑

來源：
Middle English [menstruation]
中古英語 [月經(jīng)]
from Medieval Latin
源自 中世紀拉丁語
sing. of Latin mônstrua [menses] * see menstruate
拉丁語 mônstrua的單數(shù) [月經(jīng)來潮] *參見 menstruate