'gaseous' originates from the Latin word 'gas,' which was coined by the Flemish chemist Jan Baptist van Helmont in the 17th century, inspired by the Greek word 'chaos,' meaning 'void' or 'empty space.'

'gas' was introduced into English from the Latin 'gas,' and 'gaseous' was later formed to describe the state or properties of gas.

Initially, 'gaseous' referred to the state of being a gas, but it has evolved to describe anything related to or resembling gas.