thistledown
this tle down |ˈTHisəlˌdoun ˈθɪsəlˌdaʊn | ▶noun light fluffy down that is attached to thistle seeds, enabling them to be blown about in the wind.
thistledown |ˈθɪs (ə )ldaʊn | ▶noun [ mass noun ] light fluffy down which is attached to thistle seeds, enabling them to be blown about in the wind.