extravehicular

[ek-struh-vee-hik-yuh-ler]

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
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Extravehicular has a plethora of syllables.
So is cyclotrimethylenetrinitramine. Does it mean:
given to using long words.
a white, crystalline, water-insoluble, powerful high explosive, C3H6N6O6, used chiefly in bombs and shells.
Collins
World English Dictionary
extravehicular (ˌɛkstrəvɪˈhɪkjʊlə)
 
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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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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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