pen·ta·chlo·ro·phe·nol (pěn'tə-klôr'ə-fē'nōl', -nôl', -nŏl', -klōr'-) n. A toxic white crystalline compound, C6Cl5OH, used in solution as a fungicide and wood preservative.
Main Entry: pen·ta·chlo·ro·phe·nol Pronunciation: "pent-&-"klOr-&-'fE-"nOl, -"nol-, -"klor-, -fi-' Function: noun : a crystalline compound C6Cl5OH used especially as a wood preservative, insecticide, and herbicide called also PCP