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Wiktionary
list box

n. (context graphical user interface English) A GUI widget that allows the user to select one or more items from a list contained within a static, multiple line text box.

Wikipedia
List box

A list box is a graphical control element that allows the user to select one or more items from a list contained within a static, multiple line text box. The user clicks inside the box on an item to select it, sometimes in combination with the or in order to make multiple selections. "Control-clicking" an item that has already been selected, unselects it.

A list box is called '''select''' or '''select1''' in the XForms standard. Select is used for allowing the user to select many items from a list whereas '''select1''' only allows the user to select a single item from a list.