oxyhydrogen

[ok-si-hahy-druh-juhn]
adjective
1.
pertaining to or involving a mixture of oxygen and hydrogen.
noun
2.
a mixture of oxygen and hydrogen, used in a blowtorch for welding steel plates or the like.

Origin:
1820–30; oxy-2 + hydrogen

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World English Dictionary
oxyhydrogen (ˌɒksɪˈhaɪdrədʒən)
 
n
a.  a mixture of hydrogen and oxygen used to provide an intense flame for welding
 b.  (as modifier): an oxyhydrogen blowpipe

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Example sentences
Oxyhydrogen injection systems are the best solution for fuel-efficiency and emissions.
But over time, such batteries generate oxyhydrogen, an explosive gas.
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