cuvette
/kjuːˈvet/noun
- Biochemistry a straight-sided optically clear container for holding liquid samples in a spectrophotometer or other instrument【生化】（分光光度计等仪器中盛样液用的）透明小容器, 试管。
词源
early 18th cent.: from French, diminutive of cuve 'cask', from Latin cupa.