a plant, Taraxacum officinale, native to Europe and Asia and naturalized as a weed in North America, having yellow rayed flowers and deeply notched basal leaves, which are used for salad or wine: family Asteraceae (composites)
any of several similar related plants
C15: from Old French dent de lion, literally: tooth of a lion, referring to its leaves
1513, from M.Fr. dent de lion, lit. "lion's tooth" (from its toothed leaves), transl. of M.L. dens leonis. Other folk names, like tell-time refer to the custom of telling the time by blowing the white seed (the number of puffs required to blow them all off supposedly being the number of the hour), or to the plant's more authentic diuretic qualities, preserved in M.E. piss-a-bed and Fr. pissenlit.