Vidalia onion

US /vɪˌdeɪ.li.ə ˈʌn.jən/
UK /vɪˌdeɪ.li.ə ˈʌn.jən/
"Vidalia onion" picture
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a sweet, mild onion grown exclusively in a specific region of Georgia, USA, known for its low sulfur content and distinct flavor

:
For the best onion rings, always use a Vidalia onion.
She made a delicious salad with fresh tomatoes and sliced Vidalia onion.