Valero-
Pronunciation : Val"er*o-. (Chem.)
Definition : Defn: 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.
Source : Webster's Unabridged Dictionary, 1913