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  2. Microgram - Wikipedia

    en.wikipedia.org/wiki/Microgram

    Microgram. In the metric system, a microgram or microgramme is a unit of mass equal to one millionth (1 × 10−6) of a gram. The unit symbol is μg according to the International System of Units (SI); the recommended symbol in the United States and United Kingdom when communicating medical information is mcg. In μg, the prefix symbol for ...

  3. Orders of magnitude (mass) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(mass)

    mg: milligram: 10 3 g kg: kilogram: 10 −6 g μg: microgram (mcg) 10 6 g Mg megagram 10 −9 g ng: nanogram: 10 9 g Gg gigagram 10 −12 g pg picogram 10 12 g Tg teragram 10 −15 g fg femtogram 10 15 g Pg petagram 10 −18 g ag attogram 10 18 g Eg exagram 10 −21 g zg zeptogram 10 21 g Zg zettagram 10 −24 g yg yoctogram 10 24 g Yg yottagram

  4. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).

  5. Parts-per notation - Wikipedia

    en.wikipedia.org/wiki/Parts-per_notation

    In science and engineering, the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities, e.g. mole fraction or mass fraction. Since these fractions are quantity-per-quantity measures, they are pure numbers with no associated units of measurement. Commonly used are parts-per-million (ppm, 10 ...

  6. Micro- - Wikipedia

    en.wikipedia.org/wiki/Micro-

    Micro-. Look up micro- in Wiktionary, the free dictionary. Micro (Greek letter μ, mu, non- italic) is a unit prefix in the metric system denoting a factor of 10 −6 (one millionth). [1] Confirmed in 1960, the prefix comes from the Greek μικρός (mikrós), meaning "small". It is the only SI prefix which uses a character not from the Latin ...

  7. International unit - Wikipedia

    en.wikipedia.org/wiki/International_unit

    International unit. In pharmacology, the international unit (IU) is a unit of measurement for the effect or biological activity of a substance, for the purpose of easier comparison across similar forms of substances. International units are used to quantify vitamins and biologics (hormones, some medications, vaccines, blood products and similar ...

  8. Metrication in the United States - Wikipedia

    en.wikipedia.org/wiki/Metrication_in_the_United...

    Both prescription and non-prescription dosages of pills are always measured in the SI system with the most common unit being the milligram. Smaller dosages use micrograms. Because the SI prefix μ (mu) is not well known among many Americans and is not available on most keyboards the medical industry uses the abbreviation mcg to denote ...

  9. List of abbreviations used in medical prescriptions - Wikipedia

    en.wikipedia.org/wiki/List_of_abbreviations_used...

    mcg microgram: recommended replacement for "μg" which may be confused with "mg" mdi metered dose inhaler m.d.u. more dicto utendus: to be used as directed mEq milliequivalent mg milligram mg/dL milligrams per deciliter MgSO4 magnesium sulfate: may be confused with "MSO4", spell out "magnesium sulfate" midi at midday min. minimum [or] minim [or]