Dictionary.net

• The prickly fruit or seed of certain plants (as some species of Echinospermum and Cynoglossum) which cling to the clothing of those who brush by them.

2010 - New Age Dictionary Database
By Oddity Software

• The prickly fruit or seed of certain plants (as some species of Echinospermum and Cynoglossum) which cling to the clothing of those who brush by them.

1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.