Fad (disambiguation)

The acronym FAD, in biochemistry, stands for flavin adenine dinucleotide, a cofactor in biochemical processes.

The word fad refers to a practice or interest followed for a time with exaggerated zeal.

In other uses, 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
• 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
• Food availability decline
• Freiwilliger Arbeitsdienst
• Fuerza Aérea Dominicana, spanish for Dominican Air Force