Frogs briefly treated with a five-drug cocktail administered by a wearable bioreactor were able to regrow a functional, nearly complete limb Vocabulary limb / lim / n. an arm or leg of a person or four-legged animal, or a bird's wing. The war caused the loss of life and limbs. province /ˈprävəns/ sphere or field of activity or authority Regrowth of legs and arms is the province of salamanders and superheroes. trigger /ˈtriɡər/ v. cause (an event or situation) to happen or exist. Stress could trigger an allergy. cocktail /ˈkäkˌtāl/ n. an alcoholic drink consisting of a spirit or several spirits mixed with other ingredients, such as fruit juice, lemonade, or cream. The five-drug cocktail represents a significant milestone toward the restoration of fully functional frog limbs feature /ˈfēCHər/ v, have as a prominent attribute or aspect. “ muscular features ” ...