Metal o aleación que no se estima de gran valor intrínseco.Metal or alloy that is not resistant to oxidation and corrosion in moist air; base metals are thus distinguished from "noble metal." Base metals are also usually of minimum monetary value, and are thus commonly distinguished from "precious metal" as well.Metaal of legering waaraan men geen hoge intrinsieke waarde toekent.不被認為具有高度實質價值的金屬或合金。