H2 Syllabification: (H)Pronunciation: /āCH/Translate H | into French | into German | into Italian | into Spanish Definition of H abbreviation hard (used in describing grades of pencil lead):a 2H pencil height (in giving the dimensions of an object). Physics henry(s). informal heroin. symbol Chemistry enthalpy. the chemical element hydrogen. Physics magnetic field strength. H in other Oxford dictionaries Definition of H in the British & World English dictionary
