Wordnet 3.0
NOUN (1)
1.
an elastic synthetic fabric;
The Collaborative International Dictionary of English v.0.48:
Spandex \Span"dex\, prop. n.
An elastic textile material, used for clothing [Trade name]
[PJC]
WordNet (r) 3.0 (2006):
spandex
n 1: an elastic synthetic fabric