FAD

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fad / fad/ • n. an intense and widely shared enthusiasm for something, esp. one that is short-lived and without basis in the object's qualities; a craze: the latest gardening fad. DERIVATIVES: fad·dish adj. fad·dish·ly adv. fad·dish·ness n. fad·dism / -ˌizəm/ n. fad·dist / -ist/ n.

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fadad, add, Allahabad, bad, Baghdad, bedad, begad, cad, Chad, clad, dad, egad, fad, forbade, gad, glad, grad, had, jihad, lad, mad, pad, plaid, rad, Riyadh, sad, scad, shad, Strad, tad, trad •chiliad • oread •dryad, dyad, naiad, triad •Sinbad • Ahmadabad • Jalalabad •Faisalabad • Islamabad • Hyderabad •grandad • Soledad • Trinidad •doodad • Galahad • Akkad • ecad •cycad, nicad •ironclad • nomad • maenad •monad, trichomonad •gonad • scratch pad • sketch pad •keypad • helipad • launch pad •notepad • footpad • touch pad • farad •tetrad • Stalingrad • Leningrad •Conrad • Titograd • undergrad •Volgograd • Petrograd • hexad •Mossad • Upanishad • pentad •heptad • octad

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FAD (flavin adenine dinucleotide) A coenzyme important in various biochemical reactions. It comprises a phosphorylated vitamin B2 (riboflavin) molecule linked to the nucleotide adenine monophosphate (AMP). FAD is usually tightly bound to the enzyme forming a flavoprotein. It functions as a hydrogen acceptor in dehydrogenation reactions, being reduced to FADH2. This in turn is oxidized to FAD by the electron transport chain, thereby generating ATP (two molecules of ATP per molecule of FADH2).

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FAD Flavin adenine dinucleotide, one of the coenzymes formed from vitamin B2 (riboflavin).

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fad XIX. prob. the second el. of earlier fidfad (XVIII), shortening of FIDDLE-FADDLE.

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