tooltip
tool tip |ˈto͞oltip ˈtultɪp | ▶noun Computing a message that appears when a cursor is positioned over an icon, image, hyperlink, or other element in a graphical user interface.
tooltip |ˈtuːltɪp | ▶noun Computing a message which appears when a cursor is positioned over an icon, image, hyperlink, or other element in a graphical user interface.