IPA: //ɡəˈsoʊliər//
KK: /gæˈsoʊliər/
A type of chandelier that uses gaslight for illumination, often featuring multiple arms or branches to hold gas lamps.
The elegant gasolier hung from the ceiling, casting a warm glow over the dining room.
Gasolier is derived from 'gas' (from Latin 'gas' via Dutch 'gas', meaning vapor or air) and '-olier' (a suffix used in French to denote a person or thing associated with a particular substance). The word refers to a light fixture that uses gas as a source of illumination.
Think of 'gas' as the source of light and '-olier' as something that holds or contains it — a gasolier is a fixture that holds gas to provide light.