hydrocerussite
A mineral species; a lead carbonate hydroxide. Technical term used in mineralogy.
See also: 白鉛鉱
Hydrocerussite occurs as a secondary lead mineral.
白鉛鉱 (cerussite) is a lead carbonate, while 水白鉛鉱 (hydrocerussite) is a lead carbonate hydroxide. They are related secondary lead minerals.
Compound of 水 (water, here indicating a hydrated/hydroxide mineral) + 白鉛鉱 (cerussite). The exact derivation is uncertain; the name reflects its chemical relationship to cerussite.