a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals
a path over which electrical signals can pass
a television station and its programs
a football player whose responsibility is to block players attempting to stop an offensive play
a class of drugs that inhibit (block) some biological process
(often plural) a means of communication or access
a way of selling a company's product either directly or via distributors
