-ol

from The Collaborative International Dictionary of English v.0.48

-ol \-ol\ (-[=o]l or -[o^]l) suff. [From alcohol.] (Chem.)
   A suffix denoting that the substance in the name of which it
   appears belongs to the series of alcohols or hydroxyl
   derivatives, as ethanol, carbinol, phenol, glycerol, etc.
   Such compounds contain the hydroxy radical ({-OH}).
   [1913 Webster +PJC]