ˌekəˈnädərəs noun
Usage: capitalized
Etymology: New Latin, from echin- + Greek doros leather bag, from derein to skin; from the form of the ovary — more at tear
: a genus of chiefly American aquatic or marsh herbs (family Alismataceae) having long-stalked often spotted leaves, delicate white flowers in racemes or panicles, and spiny clusters of beaked fruits