CE

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Definition

  1. Adverb:

    • Common Era: Used to denote dates in the same calendar system as Anno Domini (AD), but without religious connotations. It is often preferred in academic and secular contexts.

  2. Noun:

    • Cerium: A chemical element (symbol Ce) with atomic number 58. It is a soft, ductile, silvery metal belonging to the lanthanide series (rare-earth elements).
Usage Examples

  • Adverb:

    • The manuscript is dated to the 5th century CE.
    • Many historical events are now commonly referenced using BCE and CE.

  • Noun:

    • The alloy contained a small amount of ce to improve its properties.
    • Ce is used in the production of catalytic converters.
Advanced Usage

  • In historical dating: "CE" is paired with "BCE" (Before Common Era) as a secular alternative to the BC/AD system.

    • The war took place in 331 BCE, and the empire was consolidated by 320 CE.

  • In scientific contexts: As a noun, "Ce" often appears in chemical formulas, material science, and engineering discussions.

    • The compound CeO₂, cerium(IV) oxide, is an important polishing agent.
Variants and Related Words
  • BCE (abbreviation): Before Common Era. The counterpart to CE for dates before year 1.
  • Cerium (n): The full name for the element Ce.
  • Lanthanide (n): The series of chemical elements to which cerium belongs.
Synonyms
  • Adverb: Common Era (full form).
  • Noun: Cerium (full name), Element 58.
Important Notes
  • Capitalization: The abbreviation "CE" is typically written in capital letters.
  • Punctuation: It is standard to write it without periods (i.e., "CE," not "C.E.").
  • Context is Key: The meaning is entirely dependent on context. In a historical paper, "CE" is almost certainly the adverb. In a chemistry text, it is the chemical symbol.
Adverb
  1. of the period coinciding with the Christian era; preferred by some writers who are not Christians
    • in 200 CE
Noun
  1. a ductile grey metallic element of the lanthanide series; used in lighter flints; the most abundant of the rare-earth group

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