cre ‧ o ‧ sote /ˈkriːəsəʊt $ -soʊt/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: German ; Origin: kreosot , from Greek kreas 'flesh' + soter 'preserver' ; because it was used as an antiseptic ]
a thick brown oily liquid used for preserving wood
—creosote verb [transitive]