blowball n 1: 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}, {blowball}]
Blowball \Blow"ball`\, n. The downy seed head of a dandelion, which children delight to blow away. --B. Jonson. [1913 Webster] blowby