Gram

/græm/
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Thân thiện
Definition
  1. Noun:
    • A metric unit of mass: A unit of weight in the metric system equal to one thousandth (1/1000) of a kilogram. It is the base unit of mass in the centimeter-gram-second (CGS) system of units.
    • A person's name (eponym): Refers to Hans Christian Joachim Gram, a Danish bacteriologist known for developing the Gram stain, a laboratory technique used to classify bacteria.
Examples of Usage
  • As a unit of mass:
    • This letter weighs less than 20 grams.
    • The recipe calls for 250 grams of flour.
  • As an eponym (typically capitalized in this context):
    • The bacteria were identified using the Gram stain.
    • Gram-positive bacteria have a different cell wall structure than Gram-negative bacteria.
Advanced Usage
  • "Gram" as a suffix in measurement: Used in compound words to denote a weight of one thousand units (e.g., kilogram, milligram). However, note that these are distinct compound words, not the target word 'gram' itself.
  • Scientific terminology: In microbiology, the terms "Gram-positive" and "Gram-negative" are standard classifications derived from Hans Christian Gram's staining method. The 'Gram' in these terms is a proper adjective.
Variants and Related Words
  • Gramme: An alternative, chiefly British, spelling of 'gram' (as a unit of mass). The spelling 'gram' is more common in American English.
  • Gram-negative (adj): Describing bacteria that do not retain the crystal violet stain used in the Gram stain method.
  • Gram-positive (adj): Describing bacteria that retain the crystal violet stain and appear purple under a microscope.
Synonyms
  • g (abbreviation): The standard abbreviation for gram.
  • gm (abbreviation): A less common abbreviation for gram.
Related Phrases and Compounds

(Note: The following are common compound terms, not phrasal verbs of the single word 'gram') - Gram stain (n): The differential staining technique developed by Hans Christian Gram. - Gram molecule (n, archaic): An older term for a mole, the unit of amount of substance. - Gram atom (n, archaic): An older term for the atomic weight of an element expressed in grams.

Related Idioms

(There are no common idioms based solely on the word 'gram'.)

Noun
  1. Danish physician and bacteriologist who developed a method of staining bacteria to distinguish among them (1853-1938)
  2. a metric unit of weight equal to one thousandth of a kilogram

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