Main Entry:

sour·dough

Pronunciation:

\ˈsau̇(-ə)r-ˌdō, 1 is also -ˈdō\

Function:

noun

Date:

14th century

1: a leaven consisting of dough in which fermentation is active2 [from the use of sourdough for making bread in prospectors' camps] : a veteran inhabitant and especially an old-time prospector of Alaska or northwestern Canada