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Noun
1. lead monoxide; lead(II) oxideChemistry
Wikipedia definition
2. Lead(II) oxideLead(II) oxide is the inorganic compound with the formula PbO. Lead(II) oxide occurs in two polymorphs, red, having a tetragonal crystal structure and yellow, having an orthorhombic crystal structure. Both forms occur naturally as rare minerals: the red form is known as litharge and the yellow form is known as massicot.
Read “Lead(II) oxide” on English Wikipedia
Read “一酸化鉛” on Japanese Wikipedia
Read “Lead(II) oxide” on DBpedia

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