aerothermodynamic border

aerothermodynamic border

[¦e·rō‚thər·mō·dī′nam·ik ′bȯrd·ər]
(geophysics)
An altitude of about 100 miles (160 kilometers), above which the atmosphere is so rarefied that the skin of an object moving through it at high speeds generates no significant heat.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.