Definition of «grain sourdough»

"Grain sourdough" refers to bread that is made using fermented dough, or sourdough starter, that contains grains like wheat, rye, or oats.

I am always looking for new whole grain sourdough breads to try. (wildyeastblog.com)
If a whole grain sourdough option is there, reach for that. (foodfitnessfreshair.com)
Like, go for brown rice or wild rice instead of white rice or whole grain sourdough bread instead of white bread. (allthenourishingthings.com)
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