ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: smart (IV) + weed
1. : any of various knotweeds (genus Polygonum ) with strong acrid juice: as
a. : water pepper
b. : lady's thumb
2. : a plant (as a nettle) that causes a burning sensation in contact with the skin
ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: smart (IV) + weed
1. : any of various knotweeds (genus Polygonum ) with strong acrid juice: as
a. : water pepper
b. : lady's thumb
2. : a plant (as a nettle) that causes a burning sensation in contact with the skin
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012