extravehicular

ex·tra·ve·hic·u·lar

[ek-struh-vee-hik-yuh-ler]
adjective Aerospace.
of, pertaining to, or being an activity performed by an astronaut outside a space vehicle while in orbit: an extravehicular activity.

Origin:
1960–65; extra- + vehicular

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
extravehicular (ˌɛkstrəvɪˈhɪkjʊlə) [Click for IPA pronunciation guide]
 
adj
occurring or used outside a spacecraft, either in space or on the surface of the moon or another planet: extravehicular activity

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Extravehicular has a plethora of syllables.
So is antidisestablishmentarianism. Does it mean:
opposition to the withdrawal of state support or recognition from an established church, esp. the Anglican Church in 19th-century England.
the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).
Dictionary.com's 21st Century Lexicon
Main Entry:  extravehicular
Part of Speech:  adj
Definition:  pertaining to work performed in outer space outside of the spacecraft
Dictionary.com's 21st Century Lexicon
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