A very large American moth (Telea polyphemus) belonging
   to the Silkworm family (Bombycidae). Its larva, which is very large,
   bright green, with silvery tubercles, and with oblique white stripes on
   the sides, feeds on the oak, chestnut, willow, cherry, apple, and other
   trees. It produces a large amount of strong silk. Called also American
   silkworm.