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A-a
adj, noun
Definitions
Adjective
- 1 Abbreviation of air-to-air. abbreviation, alt-of, not-comparable
- 2 Initialism of alveolar-arterial. abbreviation, alt-of, initialism, not-comparable
"A-a gradient"
Noun
- 1 Alternative form of aa. alt-of, alternative, uncountable
"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."
See also for "a-a"
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