Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A simple, essentially tubular jet engine, such as a ramjet.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A simple jet engine consisting essentially of a tube with a means of delivering fuel and ignition into the tube. The engine can only be started in a fast airflow. This type of engine is expected to be able to provide cruising speeds at Mach numbers of around 5 to 7 (5 to 7 times the speed of sound).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a simple type of jet engine; must be launched at high speed

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[a(ero)– + th(erm)ody(namic) + d(uct).]

from Wiktionary, Creative Commons Attribution/Share-Alike License

Shortened form of aerothermodynamic duct.

Examples

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