salad dressing
US /ˈsæləd ˌdresɪŋ/
UK /ˈsæləd ˌdresɪŋ/

1.
a sauce for salads, typically made of oil, vinegar, seasonings, and sometimes other ingredients such as herbs, mayonnaise, or yogurt
:
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I prefer a light vinaigrette as my salad dressing.
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Do you have any low-fat salad dressing options?