Definition of "retractable" []

• Capable of being retracted; retractile. (adjective)
• A retractable pen. (noun)

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• "Good question: The aircraft was to be a delta-winged fighter with a watertight hull with twin retractable hydro-skis for takeoff and landing."
• "Q Celsius tires contain retractable studs for icy roads that are deployable via remote control."
• "Recent new abilities resulting from his rebirth after battling Morlun include night vision, increased sensory awareness via vibratory patterns transmitted on his web lines, and twin retractable stingers within his forearms."