caffeine n.

"drink made from the ground and roasted seeds of a tree originally native to Arabia and Abyssinia," c. 1600, from Dutch koffie, from Turkish kahveh, from Arabic qahwah "coffee," which Arab etymologists connected with a word meaning "wine," but it is perhaps rather from the Kaffa region of Ethiopia, a home of the plant (coffee in Kaffa is called būno, which itself was borrowed into Arabic as bunn "raw coffee").

The early forms of the word in English indicate a derivation from Arabic or Turkish: chaoua (1598), cahve, kahui, etc. French café, German Kaffe are via Italian caffè.

The first coffee-house in Mecca dates to the 1510s; the beverage was in Turkey by the 1530s. It appeared in Europe c. 1515-1519 and was introduced to England by 1650. By 1675 the country had more than 3,000 coffee houses and coffee had replaced beer as a breakfast drink, but its use there declined 18c. with the introduction of cheaper tea. In the American colonies, however, the tax on tea kept coffee popular.

Meaning "a light meal at which coffee is served" is from 1774. As a shade or color resembling coffee, 1815. Coffee-bean is from 1680s. Coffee-mill is from 1690s; coffee-spoon is from 1703; coffee-pot is from 1705; coffee-cup is from 1762. Coffee-shop is from 1838. Coffee-cake is from 1850 as "cake in which coffee is an ingredient." Coffee break attested from 1952, at first often in glossy magazine advertisements by the Pan-American Coffee Bureau.

Did you drink a cup of coffee on company time this morning? Chances are that you did—for the midmorning coffee break is rapidly becoming a standard fixture in American offices and factories. [The Kiplinger Magazine, March 1952]

word-forming element in chemistry, often interchangeable with -in (2), though modern use distinguishes them; early 19c., from French -ine, the suffix commonly used to form words for derived substances, hence its extended use in chemistry. It was applied unsystematically at first (as in aniline), but now has more restricted use.

The French suffix is from Latin -ina, fem. form of -inus, suffix used to form adjectives from nouns, and thus is identical with -ine (1).