(ˈ)dī|a(ˌ)zō, -ā(ˌ)zō+ noun
Etymology: International Scientific Vocabulary diaz- + methane
: a yellow odorless poisonous explosive gaseous compound CH 2 N 2 used chiefly as a methylating agent (as for converting organic acids into their methyl esters) and in converting organic acids into the next higher homologues