Fascicle or fasciculus may refer to:
Anatomy and histology Muscle fascicle, a bundle of skeletal muscle fibers Nerve fascicle, a bundle of axons (nerve fibers) Superior longitudinal fasciculus Arcuate fasciculus Gracile fasciculus Cuneate fasciculus Dorsal longitudinal fasciculus Medial longitudinal fasciculus Flechsig's fasciculus Fascicular pattern of histopathologic architecture
Botany Fascicle (botany), a cluster of flowers or leaves, such as the bundles of the thin leaves (or needles) of pines A discrete bundle of vascular tissue
Other uses Fasciculus, a fossil comb jelly Fasciculus Chemicus, a 17th-century anthology of alchemical writings Fascicle (book), a discrete section of a larger book or other published work issued in serial form