. (Chem.) A combining form (also used adjectively) indicating derivation from, or relation to, valerian or some of its products, as valeric acid; as in valerolactone, a colorless oily liquid produced as the anhydride of an hydroxy valeric acid. [ 1913 Webster ]

n. (Chem.) A ketone of valeric acid obtained as an oily liquid. [ 1913 Webster ]