noun: the light soft white substance on thistle seeds
noun: pappus of a thistle consisting of silky featherlike hairs attached to the seedlike fruit of a thistle

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Keely
""Demonstrating the overcoming of gravity, Keely used an airship model weighing about 8 lbs., which, when the differentiated wire of silver and platinum was attached to it, communicating with the sympathetic transmitter, rose, descended, or remained stationery midway, the motion as gentle as that of thistledown floating in the air." [Snell Manuscript - The Book, page 3], [MECHANICAL INVENTIONS AND INSTRUMENTS]