A computer operating system GUI element most known for its use in the Windows 3.x era. In a multiple document interface, one window contains multiple other "child" windows inside, which can be minimized, maximized, and closed, but is limited to the parent window.
by Mattjod July 29, 2021
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A brain–computer interface (BCI), sometimes called a mind-machine interface (MMI), direct neural interface (DNI), or brain–machine interface (BMI), is a direct communication pathway between the brain and an external device. BCIs are often directed at assisting, augmenting, or repairing human cognitive or sensory-motor functions.
The doctor installed a brain to computer interface to communicate with the patient.
by Margit_Jost_Kant December 20, 2015
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A play on the term graphical user interface, used to describe a poorly designed or hard to navigate user interface
I can't use a flip phone after using a smartphone, I get lost in their crapical user interface.

Government websites always look like they were designed in the 90's and built for IE, quite the crapical user interfaces
by golduck March 28, 2013
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The entire INTERFACE and process of entering a DEFINITION is EXTRAORDINARY USER FRIENDLY PERFECT and their WORD OF THE DAY makes it a HARD HABIT TO BREAK.
by PEDOPHILE PEDOPHILE August 07, 2021
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