A2

• (paper size): Specified in ISO 216.

A2

1. (international standards) ISO 216 standard paper size of 420 mm × 594 mm (16.54 in × 23.39 in), with a surface area of 0.249 m² (2.69 sq ft).
2. (finance) Long-term bond credit rating by Moody's Investors Service, indicating that a bond is upper-medium grade with low risk of default.

A2

1. (virology) A type of Asian influenza virus.
   • 1877, John Holmes Dingle, Biographical Memoirs, volume 61 (in English):

     […] antibody response to Influenza (A2) virus.

2. (cardiology) Aortic second sound.
   • 2012, Perloff, Joseph K., Marelli, Ariane, Perloff's Clinical Recognition of Congenital Heart Disease (in English):

     […] and the aortic component of the second sound (A₂) is normal.

• (aortic second sound): P2

See the Wikipedia article ISO 216, the international standard on paper sizes.

• IPA^(key): /ˈɑːtuː/

• Audio

  (file)

• Rhymes: -uː
• Hyphenation: A‧2

A2 (uncountable)

1. A standard paper size, defined by ISO 216.

   dimensions: 594 x 420 mm

• (A paper sizes): 2A0   A0   A1   A2   A3   A4   A5   A6   A7   A8   A9   A10

• “A-format” in Store norske leksikon