An older chemical name for acetylene (ethyne), a flammable hydrocarbon gas historically used in welding and lighting.
From 'cetyl' (whale-related hydrocarbon) plus '-ene' (indicating a double bond), though this naming is now obsolete in favor of 'acetylene.'
Before electricity became common, acetylene (cetylene) lamps lit homes and streets—miners even wore acetylene headlamps, creating eerie moving shadows in underground tunnels!
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