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Ethanal , ethanal (acetaldehyde) Colourless volatile flammable liquid (CH3CHO) manufactured by catalytic oxidation of ethene or ethanol, or catalytic hydration… sainfoin , sainfoin herb Onobrychis viciaefolia; also lucerne, Medicago sativa. XVII. Early forms saintfoin, St. Foine — F. †saintfoin (mod. sainfoin) orig. luc… F , F, f [Called ‘eff’]. The 6th LETTER of the Roman ALPHABET as used for English. It originated in the Phoenician symbol waw, a vertical line forking at… firth , firth •berth, birth, dearth, earth, firth, girth, mirth, Perth, worth •stillbirth • childbirth • afterbirth •Edgeworth • Hepworth • Ellsworth •Whitwo… retire , re·tire / riˈtīr/ • v. 1. [intr.] leave one's job and cease to work, typically upon reaching the normal age for leaving employment: he retired from t… Fighter Aircraft , Aircraft, Fighter
AIRCRAFT, FIGHTER. The first American-built fighter, the Thomas-Morse MB-1 Scout, appeared in 1919. The U.S. Army relied on the Cur…
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