Definition of blue billy in English:

blue billy

noun

historical

1Impure lime containing blue iron compounds, especially as a waste product of coal gas manufacture; liquid containing this.
2Copper-containing iron pyrites residue from the processing of copper ore.

Mid 19th century; earliest use found in Repertory Patent Inventions. Apparently from blue + the male forename Billy, pet-form of William.

noun

historical

1Impure lime containing blue iron compounds, especially as a waste product of coal gas manufacture; liquid containing this.
2Copper-containing iron pyrites residue from the processing of copper ore.

Mid 19th century; earliest use found in Repertory Patent Inventions. Apparently from blue + the male forename Billy, pet-form of William.

词汇	blue billy
释义	Definition of blue billy in English: blue billy noun historical 1Impure lime containing blue iron compounds, especially as a waste product of coal gas manufacture; liquid containing this. 2Copper-containing iron pyrites residue from the processing of copper ore. Origin Mid 19th century; earliest use found in Repertory Patent Inventions. Apparently from blue + the male forename Billy, pet-form of William. Definition of blue billy in US English: blue billy noun historical 1Impure lime containing blue iron compounds, especially as a waste product of coal gas manufacture; liquid containing this. 2Copper-containing iron pyrites residue from the processing of copper ore. Origin Mid 19th century; earliest use found in Repertory Patent Inventions. Apparently from blue + the male forename Billy, pet-form of William.
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