Ox·y·hy·dro·gen a. Chem. Of, pertaining to, or consisting of, a mixture of oxygen and hydrogen at over 5000° F.
Oxyhydrogen blowpipe. Chem. See Blowpipe.
Oxyhydrogen microscope, a form of microscope arranged so as to use the light produced by burning lime or limestone under a current of oxyhydrogen gas.