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• a  (of speed) having or caused by speed approximately equal to that of sound in air at sea level

• The "transonic" (transition) speed is the worst.
• It must pass through the dangerous transonic band without being thrown out of control or damaged by buffeting.
• By 1950, the year he got his doctorate from Columbia with a "secret" thesis on "transonic flows past thin airfoils," it began to look as though William Perl was associating with .

• sonic

• subsonic

News & Articles

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• Space History Photo: Lockheed C-141 Model in TDT
  The Lockheed C-141 model is in the Transonic Dynamics Tunnel, the world's first aeroelastic testing tunnel.
  Oct. 31, 2013 - SPACE.com

Quotes

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• Michael Arcuri in BigNews.biz (press release)
  Transonic has developed a technology which can help millions of people across the country deal with disease more effectively and at a lower cost,Arcuri said. "Expanding this technology to a wider market not only means improved care but...