[kal-uh] 
| 1. | Also called calla lily, arum lily. any of several plants belonging to the genus Zantedeschia, of the arum family, esp. Z. aethiopica, having arrow-shaped leaves and a large white spathe enclosing a yellow spike. |
| 2. | a related plant, Calla palustris, of cold marshes of Europe and North America, having heart-shaped leaves. |
| arum lily n. Chiefly British The calla lily. |