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transonic

[tran-son-ik] /trænˈsɒn ɪk/
adjective, Chiefly Aeronautics
1.
close to the speed of propagation of sound; moving at 700–780 miles per hour (1127–1255 km/h) at sea level.
Also, transsonic.
Origin
1940-1945
1940-45; trans- + sonic
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for transonic
  • The aerodynamic changes through this transonic region are dramatic, especially for the aircraft flying supersonic.
British Dictionary definitions for transonic

transonic

/trænˈsɒnɪk/
adjective
1.
of or relating to conditions when travelling at or near the speed of sound
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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transonic in Science
transonic
  (trān-sŏn'ĭk)   
Relating to or capable of speeds at or near the speed of sound (at or approaching Mach 1) or to aerodynamic conditions for bodies travelling at such speeds. Compare hypersonic, subsonic, supersonic.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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