br

Học thuật
Thân thiện
Definition
  1. Proper noun (abbreviation):
    • Brigate Rosse (Red Brigades): A former Italian far-left Marxist-Leninist terrorist organization, active primarily from the 1970s to the 1980s.
    • Bromine: A chemical element (symbol Br, atomic number 35), a member of the halogen group.
Usage Notes
  • As an abbreviation: "Br" is an abbreviation and is typically written in uppercase. Its meaning is entirely dependent on context.
  • Context is critical: Without clear context, "Br" is ambiguous. In a historical or political discussion, it likely refers to the terrorist group. In a chemistry, environmental, or industrial context, it refers to the element bromine.
Examples of Usage
  • Referring to the organization:
    • The kidnapping of Aldo Moro in 1978 was a major operation carried out by the BR.
    • Historical analyses of the Years of Lead in Italy often focus on the actions of the Br.
  • Referring to the chemical element:
    • Bromine (Br) is a liquid at room temperature.
    • The formula for sodium bromide is NaBr.
    • Some flame retardants contain Br compounds.
Advanced Usage
  • In academic citations: In some citation styles, "Br." is used as an abbreviation for "British" in source references.
    • J. Smith, A History, (Oxford: Oxford Univ. Press, 1999), Br. ed.
Variants and Related Words
  • Brigate Rosse: The full Italian name for the Red Brigades.
  • Red Brigades: The English translation of .
  • Bromine: The full name of the chemical element.
  • Bromide (Br⁻): The anion (negatively charged ion) of bromine, or a compound containing it.
Synonyms
  • For the organization: Red Brigades.
  • For the element: Bromine (the full name is the direct synonym).
Related Phrases & Terminology
  • Years of Lead (Anni di piombo): The period of social turmoil and political violence in Italy during the 1970s and 1980s, during which the BR was most active.
  • Halogen: The group of elements in the periodic table to which bromine belongs (includes fluorine, chlorine, iodine, and astatine).
  • Volatile liquid: A key physical property of elemental bromine.
Noun
  1. a Marxist-Leninist terrorist organization that arose out of a student protest movement in the late 1960s; wants to separate Italy from NATO and advocates violence in the service of class warfare and revolution; mostly inactive since 1989
  2. a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water

Từ đồng nghĩa

Từ gần giống

Từ chứa "br"