Definition of «walnut oil»

Walnut oil refers to the edible oil that is extracted from walnuts.

Get a 1/3 cup, fill it halfway with walnut oil and the rest of the way with olive oil. (paleoeffect.com)
I didn't have hazelnut oil so used walnut oil instead based on the author's comments about the nutty flavor. (epicurious.com)
I cooked them in walnut oil today - amazing! (thebettyrocker.com)
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