utilitarianism: doctrine that the useful is the good; especially as elaborated by Jeremy Bentham and James Mill; the aim was said to be the greatest happiness for the greatest number
doctrine: a belief (or system of beliefs) accepted as authoritative by some group or school
selenium: a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)