retractable• The tailwheel was made to be retractable and a thirdseat was added along with a gun position.• The tail-wheel was not retractable, but could be steerable as an option.• For another $ 50 million to $ 85 million of public money, a retractabledome could be added, they said.• Short twin smoke-stacks rose from the afterdeck, but, being retractable, offered no target during combat.• a retractablerazor• The new stadium will have a retractableroof.• The main stadium has a retractable roof.• It is equipped with a Grando fully retractablesafety cover.• Screwdriverblades might have a retractablesheath or ultrasonicguards, for example.