av·ens n.; pl. avens.  Bot. A plant of the genus Geum, of the rose family, esp. Geum urbanum, or herb bennet.  They may bear red, yellow, or white flowers.
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  Ben·net n.  Bot. The common yellow-flowered avens of Europe (Geum urbanum); herb bennet. The name is sometimes given to other plants, as the hemlock, valerian, etc.
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  Geum urbanum
       n : hairy Eurasian plant with small yellow flowers and an
           astringent root formerly used medicinally [syn: herb
           bennet, cloveroot, clover-root, wood avens]