sourdough

English Thesaurus

1. a settler or prospector (especially in western United States or northwest Canada and Alaska) (noun.person)

hypernym	:	prospector,
definition	:	someone who explores an area for mineral deposits (noun.person)

hypernym	:	colonist, settler,
definition	:	a person who settles in a new colony or moves into new country (noun.person)

domain region	:	west, western united states,
definition	:	the region of the United States lying to the west of the Mississippi River (noun.location)

2. a leaven of dough in which fermentation is active; used by pioneers for making bread (noun.substance)

hypernym	:	leaven, leavening,
definition	:	a substance used to produce fermentation in dough or a liquid (noun.substance)