from
The Free On-line Dictionary of Computing (8 July 2008)
pull-down menu
drop-down menu
pop-down menu
<operating system> (Or "drop-down menu", "pop-down menu") A
{menu} in a {graphical user interface}, whose title is
normally visible but whose contents are revealed only when the
user activates it, normally by pressing the {mouse} button
while the {pointer} is over the title, whereupon the menu
items appear below the title. The user may then select an
item from the menu or click elsewhere, in either case the menu
contents are hidden again. A menu item is selected either by
dragging the mouse from the menu title to the item and
releasing or by clicking the title and then the item.
When a pull-down menu appears in the main area of a window, as
opposed to the {menu bar}, it may have a small,
downward-pointing triangle to the right.
Compare: {scrollable list}.
(1999-09-22)