sourdough

noun
  1. 1

    A type of bread dough leavened with yeast and lactobacilli that produce acids giving a sour taste.

  2. 2

    An old-timer, especially in Alaska.

  3. 3

    A permanent resident of the territory. Someone who has lived in the Yukon during all four seasons.

Antonyms

adjective
  1. 1

    Made from sourdough.

Source: https://en.wiktionary.org/wiki/sourdough