/ ˌepɪˌdiːmiˈɒlədʒi; NAmE -ˈɑːl-/ noun
[ U ] the scientific study of the spread and control of diseases
► epi·demi·ologic·al / ˌepɪˌdiːmiəˈlɒdʒɪkl; NAmE -ˈlɑːdʒ-/ adjective
► epi·demi·olo·gist / ˌepɪˌdiːmiˈɒlədʒɪst; NAmE -ˈɑːl-/ noun
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WORD ORIGIN
late 19th cent.: from Greek epidēmia prevalence of disease + -logy .