Tux definition

Tux

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WordNet

noun

(1) Semiformal evening dress for men

WiktionaryText

Etymology

Coined by James Hughes as a short form of Torvalds Unix (after Linus Torvalds), perhaps also influenced by the tux (tuxedo) that penguins are sometimes humorously said to be wearing.

Proper noun

A cuddly cartoon penguin, the official Linux mascot.