Wiktionary
salad oil
n. 1 Any oil used in or as a salad dressing. 2 An edible vegetable oil other than olive oil, as corn oil or sesame oil
WordNet
salad oil
n. any of several edible vegetable oils that can be used in salad dressings
Usage examples of "salad oil".
I have the bottle of salad oil in my right hand, the vinegar in my left, and I lower them to the counter as he touches my shoulder, my hands still gripping like fists.
That was probably salad oil on Lem's hair, entirely edible and harmless.
A couple of clean shirts from the Prince's bedroom, torn into strips, and well greased on the inside with butter and salad oil off the supper table, made a fairly good dressing.