umbelliferous European plant long cultivated as food, 1660s, sellery, from French céleri (17c., originally sceleri d'Italie), said by French sources to be from Italian (Lombard dialect) seleri (singular selero), from Late Latin selinon, from Greek selinon "parsley" (in Medieval Greek "celery"), a word of uncertain origin. The c- spelling, attested by 1719 in English, is from French. Middle English words for "wild celery" were acheand selinum.

[O]ne day, in a weak and hungry moment, my roommate and I succumbed to a bit of larceny. A greengrocer's truck had parked down the street and was left unattended. We grabbed the first crate we could off the back. It turned out to be celery. For two days we ate nothing but celery and used up more calories chewing than we realized in energy. "Damn it," I said to my roommate, "What're we going to do? We can't starve." "That's funny," he replied. "I thought we could." [Chuck Jones, "Chuck Amuck," 1989]

biennial garden-herb, originally from the eastern Mediterranean; its aromatic leaves are used for flavoring and as a garnish; late 14c., a merger of Old English petersilie and Old French peresil (13c., Modern French persil), both from Medieval Latin petrosilium, an unexplained alteration of Latin petroselinum, from Greek petroselinon "rock-parsley," from petros "rock, stone" (see petrous) + selinon "celery" (see celery).

1795, genus of small evergreen trees native to west Africa, introduced and nativized in New World tropics, from a Latinized form of a West African name of the tree (compare Temne kola, Mandingo kolo). The cola-nut contains much caffeine.

Meaning "carbonated soft drink" is 1919, short for Coca-Cola, Pepsi-Cola, and their many imitators. A 1900 publication ("Alcohol," by the Woman's Christian Temperance Union) lists the names of drinks found to contain caffeine and extract of coca leaf:

Afri Cola, Ala Cola, Cafe Coca, Carre Cola, Celery Cola, Chan Ola, Chera Cola, Coca Beta, Coca Cola, Pilsbury's Coke, Cola Coke, Cream Cola, Dope, Four Kola, Hayo Kola, Heck's Cola, Kaye Ola, Koca Nola, Koke, Kola Ade, Kola Kola, Kola Phos, Koloko, Kos Kola, Lime Cola, Lima Ola, Mellow Nip, Nerv Ola, Revive Ola, Rocola, Rye Ola, Standard Cola, Toka Tona, Tokola, Vim-O, French Wine of Coca, Wise Ola.