(e) The poisonous portions are not distinguishable from the nonpoisonous, either macroscopically or microscopically.
Several species of nonpoisonous snakes were more common but were nowhere really abundant.
Her second-stage rockets were also of the nonpoisonous variety, because she fired them at a bare 60,000 feet.
poisonous poi·son·ous (poi'zə-nəs)
Relating to or caused by a poison.