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creosote (n.)

substance prepared from wood-tar, 1835, from German Kreosot, coined 1832 by its discoverer, German-born natural philosopher Carl Ludwig, Baron Reichenbach, from Greek kreo-, combining form of kreas "flesh" (from PIE root *kreue- "raw flesh") + soter "preserver," from soizein "save, preserve" (perhaps from PIE root *teue- "to swell"). So called because it was used as an antiseptic and to preserve meat. The creosote-bush (1851) is so called for its smell.

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Definitions of creosote from WordNet
1
creosote (n.)
a colorless or yellowish oily liquid obtained by distillation of wood tar; used as an antiseptic;
creosote (n.)
a dark oily liquid obtained by distillation of coal tar; used as a preservative for wood;
Synonyms: coal-tar creosote
2
creosote (v.)
treat with creosote;
creosoted wood
From wordnet.princeton.edu