1 paroxysmal Pertaining to or marked by paroxysm; caused by paroxysms or convulsions of nature. 2  paroxysmal Specifically In geology: Relating to or produced by a violent convulsion of nature.
Inorganic lead compounds are Group 2A - Probably carcinogenic to humans. American Conference for Governmental Industrial Hygienists (ACGIH): A3 - Confirmed animal carcinogen. Teratogenicity / Embryotoxicity: DEVELOPMENTAL HAZARD. May harm the unborn child. Known to cause: learning disabilities, effects on behaviour.
Lead is a cumulative poison; absorption of lead in the body over a long period of time causes it to be stored in the bones in the form of lead phosphate, where it interferes with the production of hemoglobin, leading to anemia, stomach cramps, constipation, headaches, infertility, etc. Ununquadium (Uuq, Z=82).