Simple Definition of caffeine
: a substance that is found especially in coffee and tea and that makes you feel more awake
Full Definition of caffeine
: a bitter alkaloid C8H10N4O2 found especially in coffee, tea, cacao, and kola nuts and used medicinally as a stimulant and diuretic
Examples of caffeine in a sentence
Her doctor told her to avoid caffeine.
Origin and Etymology of caffeine
German Kaffein, from Kaffee coffee, from French café
First Known Use: circa 1823
Rhymes with caffeine
Andine, arene, baleen, beguine, Benin, benzene, benzine, Bernstein, between, black bean, boreen, bovine, broad bean, buckbean, canteen, carbine, careen, chlorine, chopine, chorine, citrine, codeine, colleen, convene, cotquean, cuisine, dasheen, dauphine, demean, demesne, dry-clean, dudeen, eighteen, Essene, e-zine, fanzine, fascine, fifteen, flavine, fluorine, fourteen, gamine, gangrene, glassine, gyrene, Hellene, hoatzin, horsebean, houseclean, khamsin, Ladin, lateen, latrine, Lublin, machine, malines, marine, moline, moreen, morphine, nankeen, naphthene, Nicene, nineteen, nongreen, obscene, offscreen, on-screen, patine, piscine, poteen, praline, preteen, pristine, propine, Rabin, ratteen, ravine, red bean, routine, saline, saltine, Salween, sardine, sateen, scalene, serene, shagreen, shebeen, siren, Sistine, sixteen, Slovene, snap bean, soybean, spalpeen, string bean, strychnine, subteen, sunscreen, Szczecin, tacrine, takin, taurine, terrene, terrine, thirteen, Tolkien, tontine, tureen, umpteen, unclean, undine, unseen, vaccine, vitrine, wax bean, white bean, windscreen, yestreen, Yibin, zechin
CAFFEINE Defined for Kids
Definition of caffeine for Students
: a substance found especially in coffee and tea that makes a person feel more awake
Seen and Heard
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