[ ka-fee-niz-uh m, kaf-ee-niz-, kaf-ee-uh- ]
/ kæˈfi nɪz əm, ˈkæf iˌnɪz-, ˈkæf i ə- /


chronic toxicity caused by excessive intake of caffeine, characterized by anxiety, irritability, palpitations, insomnia, and digestive disturbances.

Origin of caffeinism

First recorded in 1885–90; caffeine + -ism Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for caffeinism

Medicine definitions for caffeinism


[ kă-fēnĭz′əm, kăfē- ]


A toxic condition marked by diarrhea, elevated blood pressure, rapid breathing, heart palpitations, and insomnia, caused by excessive ingestion of coffee and other caffeine-containing substances.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.