【医】 methyl-arsinic acid
armour; first; nail; shell【医】 carapace; concha; conchae; helo-; nail; onycho-; onyx
order; second; second-rate【医】 deutero-; deuto-; hyp-; hypo-; meta-; sub-
【化】 arsenic acid【医】 arsenic acid; ortho-arsenic acid