Ironheads definitions

Ironheads

• (n.) A European composite herb (Centaurea nigra); -- so called from the resemblance of its knobbed head to an iron ball fixed on a long handle.
Found on http://thinkexist.com/dictionary/meaning/ironheads/

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Ironheads

I'ron·heads` noun (Botany) A European composite herb ( Centaurea nigra ); -- so called from the resemblance of its knobbed head to an iron ball fixed on a long handle. Dr. Prior.
Found on http://www.encyclo.co.uk/webster/I/96

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