FAD (disambiguation)

• Fad refers to a practice or interest followed for a time with exaggerated zeal.

In other uses, FAD or fad may 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
• Fatty acid desaturase, an enzyme with a role in human metabolism
• 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 oceangoing pelagic fish such as marlin or tuna
• Flavin adenine dinucleotide, an electron acceptor that is part of the electron transport chain and involved in cellular respiration
• Food availability decline
• Foundation in Art and Design
• Fuerza Aérea Dominicana, Spanish for Dominican Air Force
• Fox's Animation Domination, a programming block on Fox
• First Assistant Director, part of a film crew