Learn in the textbookTouch Gestures, Windows, and Icons
DefinitionA radio button (ラジオボタン) is a GUI selection control that lets the user pick only one of the given options.
ExplanationSelecting one option automatically clears the mark from whichever option was selected before. This makes it suited to input fields that narrow the answer to one of a fixed set of choices, such as specifying a delivery method.
AnalogyOn old radios, pushing in one station button made the previously pressed one pop back out, so only one was ever held down. The name comes from this mechanism.
Memory hookOn screen it is usually shown as a round mark (○).