Definition

Noun 1. An oxide of barium; a whitish toxic powder: A chemical compound consisting of barium and oxygen, appearing as a white or off-white powder that is poisonous.

Usage

• This term is a specific chemical name used in scientific and industrial contexts.
• It is typically used as a mass noun (uncountable).
• Example: "The laboratory stored a sample of barium protoxide in a sealed, labeled container due to its toxicity."

Examples

• "The formation of barium protoxide was observed during the high-temperature reaction."
• "Proper safety protocols are essential when handling compounds like barium protoxide."
• "The old chemical manual listed barium protoxide as a drying agent for certain gases."

Advanced Usage

• In precise chemical nomenclature, "barium protoxide" specifically refers to barium oxide (BaO), distinguishing it from other barium oxides like barium peroxide (BaO₂).

Variants and Related Words

• Barium oxide (BaO): The modern, more common systematic name for the same compound.
• Barium monoxide: A less common synonym.
• Barium peroxide (BaO₂): A related but distinct chemical compound containing more oxygen.

Synonyms

• Barium oxide
• Barium monoxide
• Calcined baryta (an older industrial term)

Notes on Meaning

• The term "protoxide" is an older prefix in chemistry indicating the oxide containing the smallest proportion of oxygen for a given element. In modern terminology, "barium oxide" is preferred.

Noun

1. an oxide of barium; a whitish toxic powder