Fad (disambiguation)

FAD, in biochemistry, stands for flavin adenine dinucleotide.

A fad is a practice or interest followed for a time with exaggerated zeal.

FAD or fad may also refer to:

• FAD assault rifle, a bullpup rifle of Peruvian origin
• Familial Alzheimer disease, an uncommon form of Alzheimer's disease that usually strikes earlier in life
• First Appearance Datum, a geologic term used to designate the first (oldest) appearance of a species in the geologic record
• Folie à Deux (album), the fifth album by the American rock band, Fall Out Boy
• Fish Aggregation Device, a man-made object used to attract ocean going pelagic fish such as marlin or tuna
• Flea allergy dermatitis, a skin disease of dogs and cats
• Flavin adenine dinucleotide, a cofactor in biochemical processes
• Freiwilliger Arbeitsdienst
• Fuerza Aérea Dominicana, spanish for Dominican Air Force