ar

Học thuật
Thân thiện
ar

A farmer measures a field of one ar.

Definition
  1. Noun:
    • A unit of surface area: An "ar" is a metric unit of area equal to 100 square meters.
    • An inert gas: "Ar" is the symbol for the chemical element argon, a colorless and odorless noble gas.
    • A US state abbreviation: "AR" is the standard two-letter postal abbreviation for the state of Arkansas.
Usage Examples

  • Noun (Unit of area):

    • The small garden plot was exactly one ar in size.
    • We measured the land in ares rather than square feet.

  • Noun (Chemical element):

    • The light bulb was filled with ar to prevent the filament from oxidizing.
    • Ar is used in welding to create an inert atmosphere.

  • Noun (US State):

    • The package was shipped to Little Rock, AR.
    • Her mailing address ended with "Fayetteville, AR 72701".
Advanced Usage
  • Scientific Context: In chemistry and physics, "Ar" is consistently used as the atomic symbol for argon (atomic number 18) in formulas and periodic tables.
  • Cartography and Land Measurement: The unit "ar" is primarily used in some European countries for measuring plots of land, though the hectare (100 ares) is more common.
Variants and Related Words
  • Are: An alternative, more common spelling for the unit of area. "One are is equivalent to 100 square meters."
  • Hectare: A larger unit of area equal to 100 ares.
  • Argon: The full name of the element represented by the symbol "Ar".
Synonyms
  • Unit of Area: (None that are exact synonyms; it is a specific metric unit).
  • Element: Argon.
  • State: Arkansas.
Related Phrases
  • Per are: A phrase used in agriculture or real estate to express a rate per unit area.
    • The yield was 500 kilograms per are.
Notes on Usage
  • Capitalization: When referring to the chemical element or the state, "Ar" is typically written with a capital 'A'. The unit of area is written in lowercase ("ar" or "are").
  • Context is Key: The meaning of "ar" is entirely dependent on context—scientific, geographical, or related to measurement. It is rarely used in general conversation without clarifying context.
ar

A farmer measures a field of one ar.

Noun
  1. a state in south central United States; one of the Confederate states during the American Civil War
  2. a unit of surface area equal to 100 square meters
  3. a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere

Từ đồng nghĩa

Từ gần giống

Từ chứa "ar"