The Collaborative International Dictionary
Protractile
Protractile \Pro*tract"ile\, a. Capable of being protracted, or protruded; protrusile.
Wiktionary
protractile
a. That can be protracted (as a cat's claws)
WordNet
protractile
adj. able to be extended; "protractile muscle" [syn: protractible]
Usage examples of "protractile".
Which move, however, made sense, since a ship was most vulnerable in the moment that it cut the main drive and shifted its entire mass onto protractile supports.