from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A rocket used to make observations anywhere within the earth's atmosphere.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun a
suborbital rocketused to launch upper atmosphere, exoatmospheric, and microgravity sondesor probes
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a research rocket used to obtain information about the atmosphere at various altitudes
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