Valero-
Val´er`o-
| 1. | (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. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.