Why is the ninth month called September?
1967, the science of divining from demographic statistics; see demography + -ics. Originally in reference to TV audiences and advertisers.
1891, from demography + -ic. As a noun, by 1998, short for demographic group or category. Related: Demographical; demographically.
demographic dem·o·graph·ic (děm'ə-grāf'ĭk, dē'mə-)adj. Of or relating to demography.