Definition for: aa

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- Other Translations

English

Pronunciation

• ä'ä, /ˈɑːɑː/, /"A:A:/

Etymology

From the Hawaiian word ʻaʻā.

Noun

aa ( uncountable )

1. A form of lava flow of basaltic rock, usually dark-colored with a jagged and loose, clinkery surface. It is one of two chief forms of lava flow emitted from volcanoes of the Hawaiian type, the other form being pahoehoe.

   Quotations

   • 1859 - R. C. Haskell in American journal of science and arts , series XXVIII

     We...saw 'pahoihoi' or solid lava forming, and also 'aa' or clinkers.

   • 1883 - Clarence E. Dutton in the fourth Annual report of the United States Geological Survey

     The second form of the lavas is called by the natives a-a, and its contrast with pahoehoe is about the greatest imaginable. It consists mainly of clinkers sometimes detached, sometimes partially agglutinated together with a bristling array of sharp, jagged, angular fragments.

   • 1944 - Charles A. Cotton: Volcanoes as landscape forms

     Cooling and solidification frequently takes a different course...in lava flows, producing the clinker-like 'aa' lava.

Translations

Estonian

Interjection

aa

1. An interjection expressing recognition -

   Aa , see oled sina.  : Oh , it's you.

2. An interjection expressing understanding -

   Aa , saan aru.  : Ah , I understand.

Other Translations for "aa"

Braille 6 Dot
Braille 8 Dot
Sign Language Spelling
Morse Code		aa
Hex		e1 e1
Pig Latin		aaway

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