HM has various meanings in the Scientific & Educational category. Discover the full forms, definitions, and usage contexts of HM in Scientific & Educational.
Any solid, liquid, or gas that can harm people, other living organisms, property, or the environment. It may be radioactive, flammable, explosive, toxic, corrosive, biohazardous, an oxidizer, an asphyxiant, a pathogen or an allergen.
Scientific & EducationalThe harmonic mean is one of the three Pythagorean means. For all positive data sets containing at least one pair of nonequal values, the harmonic mean is always the least of the three means, while the arithmetic mean is always the greatest of the three and the geometric mean is always in between.
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