anˈtigəˌnän noun
Usage: capitalized
Etymology: New Latin, from Greek anti- similar to, like (from anti against, instead of, equivalent to) + -gonon, from polygonon knotgrass ( Polygonum aviculare ) — more at anti- , polygonum
: a genus of tropical American tendril-climbing herbs (family Polygonaceae) having apetalous flowers with brightly colored petaloid sepals — see coralvine