fascicle (n.)

"a bunch, bundle, small collection," 1620s, from Latin fasciculus "a small bundle, a bunch (of flowers); small collection (of letters, books, etc.)," diminutive of fascis (see fasces). As "part of a work published in installments," 1640s (also fascicule, from French). Related: Fasciculate; fasciculation; fascicular; fascicularly; fasciculated.