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olefin [olefins]▼◼◼◼noun[UK: ˈolə.ˌfɪn] [US: ˈolə.ˌfɪn]
olefine [olefines]▼noun[UK: ˈəʊlfaɪn] [US: ˈoʊlfaɪn]
olefinic▼adjective[UK: əʊlfˈɪnɪk] [US: oʊlfˈɪnɪk]
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