also: じねんどう
native copper
Mineralogy term for naturally occurring metallic copper, as opposed to refined copper.
Native copper is mined at this mine.
Standard kanji spelling for native copper.
Alternate reading; less common than しぜんどう.
Compound of 自然 (natural) and 銅 (copper). The reading しぜんどう is the standard on'yomi combination; じねんどう uses the older go-on reading for 自然.