hydromagnesium

== English == === Etymology === From hydro- +‎ magnesium. === Noun === hydromagnesium (uncountable) (chemistry, in combination) The univalent radical HMg- 2013 Carlos Cabezas et al, "Laboratory and Astronomical Discovery of HydroMagnesium Isocyanide" arXiv We report on the detection of hydromagnesium isocyanide, HMgNC, in the laboratory and in the carbon rich evolved star IRC+10216.