Hound's-tongue n.  Bot. A biennial weed (Cynoglossum officinale), with soft tongue-shaped leaves, and an offensive odor. It bears nutlets covered with barbed or hooked prickles. Called also dog's-tongue.
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  Cynoglossum officinale
       n : biennial shrub of Europe and western Asia having coarse
           tongue-shaped leaves and dark reddish-purple flowers
           [syn: hound's-tongue]