- (informal) Any plant of the family Araceae, found chiefly in the tropics.
- 1920, Sir Harry Johnston, Mrs. Warren's Daughter, , , http://www.gutenberg.org/etext/15380 , “They made their way slowly to the great Palm House and thence up twisty iron steps to a nook like a tree refuge in New Guinea, among palm boles and extravagant aroid growths. ”
- 2000, Anton Ivancic, Vincent Lebot, The Genetics and Breeding of Taro, page 15, The majority of aroids are climbers and epiphytes of tropical rainforests.
- arum plant of genus Arum