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n.1.(Bot.) any of several plants having seeds tipped with barbs that may cling to fur or clothing, especially those of the genus Bidens, also called bur marigold, beggar-ticks, and Beggar's ticks, which have prickly flattened achenes.
2.a seed from a sticktight{1}.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.