What is the meaning of Fascicle?

A bundle or cluster.

A bundle of skeletal muscle fibers surrounded by connective tissue.

A cluster of flowers or leaves, such as the bundles of the thin leaves (or needles) of pines.

A discrete bundle of vascular tissue.

A discrete section of a book issued or published separately, generally as a temporary measure while the work is in progress.

fascicle

Source: wiktionary.org