Definition of mono- in US English:
mono-
(also mon-)
combining formˈmänōˈmɑnoʊ
1One; alone; single.
表示“单”，“一”，“单一”
- 1.1 With an extreme, singular character to the point of dominance or exclusion.
2Chemistry
(forming names of compounds) containing one atom or group of a specified kind.
〔化〕 构成化合物名称表示“一的”，“单的”
Origin
From Greek monos ‘alone’.