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fisheye lens a wide-angle camera lens that covers a full 180 degrees, producing images characterized by peripheral distortion and dramatically foreshortened perspective.
motherboard the main printed circuit board of a personal computer, which holds chips containing the central processing unit, memory, ports, and the integrated circuits that control the keyboard and other standard peripheral devices, and to which additional circuit boards can be attached.
tunnel vision an abnormal condition in which one loses peripheral vision. [1/2 definitions]