"Teratogen" means any substance that, during the development of an embryo, causes permanent structural or functional changes in the offspring.
N.H. Admin. Code § Env-Hw 104.57
(See Revision Note at chapter heading for Env-Hw 100) #9360, eff 1-28-09; renumbered by #10204 (from Env-Hw 104.56 )