SOURDOUGH
sourdough
(noun) a settler or prospector (especially in western United States or northwest Canada and Alaska)
sourdough
(noun) a leaven of dough in which fermentation is active; used by pioneers for making bread
Source: WordNet® 3.1
Etymology
Noun
sourdough (countable and uncountable, plural sourdoughs)
A type of bread dough leavened with yeast and lactobacilli that produce acids giving a sour taste. [from 14th c.]
(countable, slang) An old-timer, especially in Alaska. [from 1898]
(countable, Yukon) A permanent resident of the territory. Someone who has lived in the Yukon during all four seasons.
Antonym: cheechako
Adjective
sourdough (not comparable)
Made from sourdough.
Source: Wiktionary