light metalsとは意味:light metals 軽金属 けいきんぞく light metals meaning:[Medicine] Metals with low specific gravity,typically smaller than 5,characterized by a single valence (1,2,or 3),a simple spectrum,strong electromotive force (positive),and colorless compounds. (From...light metals en francais:métaux légers (métaux de faible poids comme l'aluminium, le lithium et autres)