microgramme

A scientist carefully measures one microgramme of a white powder on a digital scale.

Definition

Noun: A unit of mass equal to one millionth (1/1,000,000) of a gram. It is a metric measurement used primarily in scientific and medical contexts to express very small quantities.

Usage Examples

• (A very small amount of the drug is prescribed.)
• (The concentration is expressed in extremely tiny units.)
• (The weight is negligible in everyday terms.)

Advanced Usage

• "per microgramme": used to indicate a rate or concentration relative to this unit.

  • The toxin is lethal at 0.1 microgrammes per kilogram of body weight. (The fatal dose is a fraction of a gram relative to body mass.)

• "in the range of microgrammes": referring to quantities so small they are measured in this unit.

  • The sample contained trace metals in the range of microgrammes. (Only minuscule amounts were detected.)

Variants and Related Words

• Microgram (n): an alternative spelling of "microgramme," more common in American English.

  • The lab report listed the result in micrograms. (The spelling variation does not change the meaning.)

• Milligram (n): a unit of mass equal to one thousandth of a gram, or 1,000 microgrammes.

  • One milligram equals 1,000 microgrammes. (A larger unit for slightly larger quantities.)

• Nanogram (n): a unit of mass equal to one billionth of a gram, or 0.001 microgrammes.

  • Hormone levels are often reported in nanograms per millilitre. (An even smaller unit than microgramme.)

Synonyms

• Millionth of a gram: the explicit definition of the unit.
• µg: the scientific symbol for microgramme (µ is the Greek letter mu).
  • The label read "500 µg" for the vitamin supplement. (The symbol is commonly used in prescriptions and lab data.)

Related Idioms

• (No common idioms exist for "microgramme," as it is a technical term.)

Phrasal Verbs

• (No phrasal verbs are associated with "microgramme.")