ˈa(a)rəm, ˈer-, ˈār- noun
Etymology: New Latin, from Latin, arum, from Greek aron; perhaps akin to Latin arundo reed
1. capitalized : a genus (the type of the family Araceae) of herbs of Europe and Asia with usually heart-shaped leaves and a large spathe with edges involute at the base
2. -s : any of several plants of the family Araceae, especially of the genus Arum — see cuckoopint
3. -s : a sagolike starch obtained from cuckoopint root : portland arrowroot