Twix

Brand name, derived from twin and bix (since there are two biscuits of the product in each package).

Twix (plural Twixes)

1. A popular chocolate bar produced by the Mars company, consisting of a biscuit with other confectionery toppings and coatings (most frequently caramel and milk chocolate).
   • 2008, Cordelia Fine, A Mind of Its Own: How Your Brain Distorts and Deceives, page 173:

     Then—oh so casually—she was asked to select either a Twix bar or an apple, as thanks for her participation in the experiment.

   • 2015, Branch Kimball, My Eating Disorder: Thoughts During Sickness and Recovery

     I even ate a Twix before bed each night, not once thinking about how many miles it would take me to run off the calories.