Definition

1. Noun:
   • A chemical compound: Arsine is a colorless, flammable, and highly poisonous gas with the chemical formula AsH₃.
   • A substance with specific uses: It is used in the field of organic synthesis, in the doping of semiconductor materials for transistors, and has been employed as a chemical weapon in warfare.

Usage

• Arsine is primarily a technical term used in chemistry, materials science, and military contexts.
• It is an uncountable noun when referring to the substance in general (e.g., "exposure to arsine").
• It can be used countably when referring to types or molecules (e.g., "arsine and its derivatives").

Examples

• Noun:
  • The laboratory had strict protocols for handling arsine due to its extreme toxicity.
  • In semiconductor manufacturing, arsine is used to introduce arsenic atoms into silicon crystals.
  • The use of arsine as a poison gas is banned under international chemical weapons conventions.

Advanced Usage

• "Arsine gas": A common collocation specifying the gaseous state.
  • A leak of arsine gas required the immediate evacuation of the facility.
• In organic chemistry, arsine can refer to a class of organoarsenic compounds derived from AsH₃ (e.g., trimethylarsine).

Variants and Related Words

• Arsenic (n): The chemical element (As) from which arsine is derived.
• Arsine oxide (n): The compound formed when arsine is oxidized.
• Stibine (n): A related toxic gas (SbH₃) containing antimony, analogous to arsine.

Synonyms

• Arsenic trihydride: The systematic chemical name for AsH₃.
• Arseniuretted hydrogen: An older, alternative name for the compound.

Notes on Meaning

• The primary meaning is the specific chemical compound AsH₃. Its extreme toxicity is a defining characteristic in all contexts, whether industrial, scientific, or historical (warfare).

Noun

1. a poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare