Toxic gas from behind engulfing almost all of pub

• Chemical warfare gas
• Poisonous flammable gas
• Poisonous gas that smells like garlic
• A poisonous colorless flammable gas used in organic synthesis and to dope transistors and as a poison gas in warfare
• Poisonous compound

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Arsine \Ar"sine\ ([aum]r"s[i^]n or -s[=e]n), n. [From Arsenic .] (Chem.) A compound of arsenic and hydrogen, AsH3 , a colorless and exceedingly poisonous gas, having an odor like garlic; arseniureted hydrogen. [1913 Webster] ||

Wiktionary Word definitions in Wiktionary
n. 1 (context inorganic compound uncountable English) A compound of arsenic and hydrogen, AsH 3 , a colorless and exceedingly poisonous gas, having an odor like garlic. 2 (context organic chemistry countable English) Any organic derivative of this compound, ...

Wikipedia Word definitions in Wikipedia
This page provides supplementary chemical data on arsine .