The Collaborative International Dictionary of English v.0.48:
nonretractable \nonretractable\ nonretractile \nonretractile\adj. not able to be drawn into the main body; -- of claws and other extensile parts of animals or objects; as, a bear's claws, unlike a cat's, are nonretractile. Opposite of retractile. [WordNet 1.5]WordNet (r) 3.0 (2006):
nonretractile adj 1: not capable of being retracted [syn: nonretractile, nonretractable] [ant: retractile]