Narcissists believe their personality and appearance is superior to others. Symptoms of narcissism include focusing only on one's self, lacking guilt and an inability to empathize. Narcissistic people tend to be vain. A marriage being undermined by narcissism might benefit from therapy.
Trocar: A sharply pointed shaft, usually with a three-sided point. A trocar may be used within a cannula, a hollow tube, designed to be inserted into a vein, artery, bone marrow or body cavity. The word trocar is derived from the French trois (three) + carre (side). Last Editorial Review: 6/9/2016.
Nibbler (1982) is a single-player arcade game where the snake fits tightly into a maze, and the gameplay is faster than most snake designs. Another single-player version is part of the 1982 Tron arcade game, themed with light cycles. It created new interest in the snake concept, and many subsequent games borrowed the light cycle theme. Starting in 1991, Nibbles was included with MS-DOS for a period of time as a QBasic sample program.