Tumbleweed
Pronunciation : Tum"ble*weed`
Part of Speech : n.
Definition : Defn: Any plant which habitually breaks away from its roots in the autumn, and is driven by the wind, as a light, rolling mass, over the fields and prairies; as witch grass, wild indigo, Amarantus albus, etc.
(Bot.)
Source : Webster's Unabridged Dictionary, 1913