creosote
Concise Oxford English Dictionary © 2008 Oxford University Press:
creosote/ˈkriːəsəʊt/
▶noun a dark brown oil containing various phenols and other compounds, used as a wood preservative. ▶verb treat with creosote.
– origin C19: coined in Ger. from Gk kreas ‘flesh’ + sōtēr ‘preserver’, with ref. to its antiseptic properties.
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