Definition of "subcult"

There was a kind of ghostly teenage DNA at work in the Sprawl, something that carried the coded precepts of various short-lived subcults and replicated them at odd intervals.

1984, William Gibson, Neuromancer (Sprawl; book 1), New York, N.Y.: Ace Books, page 58

The cult of the footage is rife with subcults, claiming every possible influence.

2003, William Gibson, Pattern Recognition (Bigend cycle; book 1), New York: G. P. Putnam's Sons, page 4