red onion
noun1
A type of onion with reddish purplish skin.
- Marcus Empiricus, a Roma physician, prescribed three scruples of cress, three of red onion, three of pine seed, three of Indian nard, for impotence.1961, Harry E. Wedeck, Dictionary of Aphrodisiacs, New York: The Citadel Press, page 70:
2
An instance of this type.