That can expand or be expanded: an expansible antenna. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "expansible" in a sentence
"By Mesa de café expansible « MUNDO HOGAR on October 2, 2009 at 7: 22 am"
"Popular and institutional memories also ignored the real operational lessons of Plattsburgh: the strategic resilience of a professional army when supported by an expansible militia; the necessity of close interservice cooperation; and the necessity for expeditionary-capable logistical support when operating in lightly populated wilderness."
"Washington had in mind an expansible army of 2,600 men to defend frontiers against Native peoples and neighboring European colonists, prepare for war, establish magazines and arsenals, and train state militias to a national standard."