Rock or other material that contains valuable or utilitarian materials; primarily a rock containing metals or gems for which it is typically mined and processed.
Origin
From Middle English or, oor, blend of Old English ōra ("ore, unwrought metal") and ār, the first a derivate of ear, the second from Proto-Germanic *aiz (cognates Old Norse eir ("brass, copper"), German ehern ("of metal, of iron"), Gothic 𐌰𐌹𐌶 ("ore")), from Proto-Indo-European *áyos. Compare Dutch oer ("ferrous hardpan; bog iron ore"). Compare Latin aes ("bronze, copper"), Avestan 𐬀𐬌𐬌𐬀𐬵, Sanskrit अयस् ("copper, iron").
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