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Meaning of lead dioxide

lead' diox'ide

Pronunciation: (led), [key]
— Chem. Chem.
  1. a brown crystalline compound, PbO, toxic, insoluble in water and alcohol, soluble in glacial acetic acid: used as an oxidizing agent, in lead-acid batteries, and in analytical chemistry.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.