Chem. Also creasol. [f. CREOS(OTE + -OL.] A colorless highly refracting liquid (C8 H10 O2) with aromatic odor and burning taste, forming the chief constituent of creosote.

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1863–72.  Watts, Dict. Chem., II. 103. Creosol, the principal constituent of wood-creosote. Ibid. (1873), Fownes’ Chem., 806. Creasol is a diatomic phenol from guniacum.

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  Hence Creosyl [-YL], the radical of creosol, as in creosyl chloride C8 H9 O Cl.

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1872–9.  Watts, Dict. Chem., VI. 595. Creosyl chloride … is a limpid strongly refracting oily liquid.

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