Definitions of d on the Web:
vitamin D: a fat-soluble vitamin that prevents rickets
www.cogsci.princeton.edu/cgi-bin/webwn
five hundred: the cardinal number that is the product of one hundred and five
www.cogsci.princeton.edu/cgi-bin/webwn
the 4th letter of the Roman alphabet
www.cogsci.princeton.edu/cgi-bin/webwn
five hundred: denoting a quantity consisting of 500 items or units
www.cogsci.princeton.edu/cgi-bin/webwn
