fascicle

Concise Oxford English Dictionary © 2008 Oxford University Press:
fascicle /ˈfasɪk(ə)l/

▶noun

• 1 (also fascicule /-kjuːl/) a separately published instalment of a book.

• 2 (also fasciculus /faˈsɪkjʊləs/) Anatomy & Biology a bundle of structures, such as nerves or muscle fibres.

– derivatives
fascicled adjective,
fascicular adjective,
fasciculate /-ˈsɪkjʊlət/ adjective.

– origin C15: from L. fasciculus, dimin. of fascis ‘bundle’.