Metaal of legering waaraan men geen hoge intrinsieke waarde toekent. (nl)
Metal o aleación que no se estima de gran valor intrínseco. (es)
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. (en)