epidemiology

noun

ep·​i·​de·​mi·​ol·​o·​gy ˌe-pə-ˌdē-mē-ˈä-lə-jē 

-ˌde-mē-

1

: a branch of medical science that deals with the incidence, distribution, and control of disease in a population

2

: the sum of the factors controlling the presence or absence of a disease or pathogen

epidemiological

ˌe-pə-ˌdē-mē-ə-ˈlä-ji-kəl  -ˌde-mē- 

adjective

or less commonly epidemiologic

ˌe-pə-ˌdē-mē-ə-ˈlä-jik 

-ˌde-mē-

epidemiologically

ˌe-pə-ˌdē-mē-ə-ˈlä-ji-k(ə-)lē 

-ˌde-mē-

adverb

epidemiologist

ˌe-pə-ˌdē-mē-ˈä-lə-jist  -ˌde-mē- 

noun

Examples of epidemiology in a Sentence

Recent Examples on the Web

But some patients there are reluctant to be tested for measles, limiting abilities to capture the full scale and epidemiology of the outbreak. —Deidre McPhillips, CNN Money, 7 Apr. 2025

All the while, David and his wife, Megan, an accomplished runner, podcast host, and dual-doctorate holder in medicine and epidemiology, toggled between talking with me and playing with and feeding both kids. —Devin Kelly, Outside Online, 3 Apr. 2025

Their letters cited two studies from the Journal of Athletic Training—a 2007 study analyzing injury epidemiology across 15 college sports and a 2022 study examining the concussion rates in spring football. —Daniel Libit, Sportico.com, 1 Apr. 2025

The evidence doesn’t support that view, according to study coauthor Walter Willett, professor of epidemiology and nutrition at the Harvard T.H. Chan School of Public Health in Boston. —Julianna Bragg, CNN, 6 Mar. 2025

Word History

Etymology

borrowed from French, Spanish, or New Latin; French épidémiologie, borrowed from Spanish epidemiología, borrowed from New Latin epidēmiologia, from Medieval Latin epidēmia "disease affecting a large number of individuals, epidemic" + New Latin -o- -o- + -logia -logy — more at epidemic entry 1

Note: New Latin epidēmiologia was used in the title of a treatise by the Calabrian physician Quinto Tiberio Angelerio (1532-1617), Epidemiologia, sive Tractatus de peste (Madrid, 1598), a second edition of his earlier work Ectypa pestilentis status Algheriae Sardiniae (Cagliari, 1588), detailing methods to cope with a plague outbreak in Alghero, Sardinia, in 1582-83. The Latin word was revived by the Spanish physician Joaquín de Villalba (1752-1807) in his Epidemiología española (Madrid, 1802), a history of epidemics in Spain that was widely disseminated in Europe.

First Known Use

1850, in the meaning defined at sense 1

Rhymes for epidemiology

• anesthesiology
• ethnomethodology
• ethnomusicology
• gastroenterology
• immunobiology
• immunopathology
• neuropharmacology
• neurophysiology
• neuroradiology
• otolaryngology
• paleobiology
• paleoecology

Kids Definition

epidemiology

noun

ep·​i·​de·​mi·​ol·​o·​gy ˌep-ə-ˌdē-mē-ˈäl-ə-jē 

1

: a branch of medical science that deals with the occurrence, distribution, and control of disease in a population

2

: the sum of the factors controlling the presence or absence of a particular disease

epidemiological

-mē-ə-ˈläj-i-kəl 

adjective

also epidemiologic

-ˈläj-ik 

Medical Definition

epidemiology

noun

ep·​i·​de·​mi·​ol·​o·​gy -jē 

plural epidemiologies

1

: a branch of medical science that deals with the incidence, distribution, and control of disease in a population

2

: the sum of the factors controlling the presence or absence of a disease or pathogen

epidemiological

-ˌdē-mē-ə-ˈläj-i-kəl  -ˌdem-ē- 

adjective

also epidemiologic

-ik 

epidemiologically

-i-k(ə-)lē 

adverb