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Definition of Thistledown
1. Noun. Pappus of a thistle consisting of silky featherlike hairs attached to the seed-like fruit of a thistle. 
Generic synonyms: Pappus
Definition of Thistledown
1. [n -S]
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1. Noun. Pappus of a thistle consisting of silky featherlike hairs attached to the seed-like fruit of a thistle. 
1. [n -S]