Context Sentence: The age of the UK and the demographic time bomb

Source: Abercrombie, Family, Households and Life Courses, CONTENPORARY BRITISH SOCIETY, Third Edition.

Definition: study of statistics of births, deaths, diseases,etc in order to show the state of a community(Oxford Advanced Learner's English--Chinese Dictionary, Fourth Edition, 1998)

Mnemonic:demo- comb form means of people, of population.