Definition of "aroid"

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.

1920, Sir Harry Johnston, Mrs. Warren's Daughter‎

Jack-in-the-pulpit is the only other aroid native to our part of the world.

1997 March 7, Jerry Sullivan, “Field & Street”, in Chicago Reader‎

The majority of aroids are climbers and epiphytes of tropical rainforests.

2000, Anton Ivancic, Vincent Lebot, The Genetics and Breeding of Taro, page 15