ˈkalə noun
Etymology: New Latin, modification of Greek kallaia rooster's wattles, perhaps from kallos beauty — more at calli-
1. capitalized : a genus of bog herbs (family Araceae) with ovate cordate leaves and a spreading spathe with white upper surface and a short cylindrical spadix — see water arum
2. -s
a. or calla lily : a familiar house plant or greenhouse plant ( Zantedeschia aethiopica ) with a flowerlike inflorescence consisting of a pure white showy spathe and yellow spadix
b. : any of various plants resembling but not necessarily related to the calla — see black calla , golden calla , pink calla