What is "blowball"

Blowball \Blow"ball`\, n. The downy seed head of a dandelion, which children delight to blow away.
--B. Jonson.

n. The downy seed head of a dandelion, a dandelion clock.

n. any of several herbs of the genus Taraxacum having long tap roots and deeply notched leaves and bright yellow flowers followed by fluffy seed balls [syn: dandelion]